"Unaffected" Is Not "Cannot Be Targeted" and Is Not "Cannot Be Equipped"
A very common Judge mistake is collapsing three distinct game concepts into one:
- Applying an effect to a monster.
- Targeting a monster with an effect.
- Attaching / equipping a card to a monster.
A monster that is unaffected by some category of effects only blocks #1 — the
application of those effects. It does not by itself block #2 (targeting) or #3
(equipping/attaching). Each of those needs its own explicit protection text.
What "unaffected" actually does
"This card is unaffected by [Spell effects / Trap effects / your opponent's card
effects / activated card effects / etc.]" means: while that status is active, effects
in that category do nothing to the monster. The effect still activates, still
resolves, and can still legally pick the monster — the monster simply does not
receive the result.
Critically, "unaffected" does not say "cannot be targeted." Targeting is only
prevented by text that explicitly says "cannot be targeted" (or "your opponent
cannot target," etc.). An effect that targets an unaffected monster still resolves;
the part that would change the unaffected monster just fails to apply, while the rest
of the effect (other targets, follow-up clauses) proceeds normally.
Equip Cards and unaffected monsters — you CAN still equip
Exception wording matters: "unaffected" is not itself an exception to the ordinary Equip Spell rule that Equip Cards target and stay equipped. Only explicit text such as "cannot be equipped" or an "Equip only..." restriction changes the legality.
Official ruling: an Equip Card can be equipped to a monster that is unaffected by
that Equip Card's effects. The equip succeeds and the card stays attached —
its applied effects (ATK/DEF changes, protection, restrictions, granted effects)
simply do nothing while the monster is unaffected.
- Equip Cards continuously target the monster they are equipped to. Being unaffected
does not "kick off" or block the equip, because, again, unaffected ≠ cannot be
targeted.
- If the monster later loses the unaffected status, the already-equipped card's
effects begin applying at that point. The card was attached the whole time.
- The same holds for an effect that equips itself (or equips another card) to a
monster as part of resolution: the attach still happens; only the applied effects
are suppressed while the monster is unaffected.
The only things that actually stop the attach are explicit clauses such as
"cannot be equipped with Equip Cards" or a card that can't have any Equip Cards —
not the generic "unaffected" status.
Equip Spells attach to EITHER player's monster — card text is the only restriction
There is no general rule that an Equip Spell Card may only be equipped to a monster
you control. By default an Equip Spell may target and attach to any face-up
monster on either side of the field. The only thing that narrows this is the card's
own printed text:
- If the text says "Equip only to a monster you control" (or "a [subtype] monster
you control"), it is restricted to your side.
- If the text says "Equip only to a monster your opponent controls," it is
restricted to the opponent's side.
- If the text gives a property restriction with **no "you control" / "your opponent
controls" clause at all, it can be equipped to a qualifying monster on either**
side, including the opponent's.
So the right question is never "is it my monster?" — it is "**does this specific card's
text restrict which side?**" Absent such a clause, equipping to an opponent's monster is
fully legal.
Axe of Despair — "The equipped monster gains 1000 ATK. ..." No "you control"
clause, so it can be equipped to your opponent's monster (e.g. to push it over
your own attacker's ATK for a calculation, or any other reason). Legal.
United We Stand — "The equipped monster gains 800 ATK/DEF for each face-up monster
you control." The boost references you, but the equip-target text here is the
generic Equip subtype with no side clause, so it too can legally be equipped to an
opponent's monster (the boost then counts monsters the Equip's controller owns —
see control note below).
Snatch Steal — "Equip only to a monster your opponent controls. Take control of
the equipped monster. ..." This one is restricted to the opponent's side by its own
text — the inverse case, and proof that the side restriction lives in card text, not in
a blanket rule.
Control note: "you" in an Equip Card's text always means the player who **controls
the Equip Card**, regardless of who controls the equipped monster. Equipping to an
opponent's monster does not transfer the Equip Card's control, and changing control
of the equipped monster does not change control of the Equip Card.
This is the same separation as the rest of this file: performing the equip (legal on
either side unless text says otherwise) is distinct from what the equip then does.
Do not invent a "you can only equip to your own monsters" rule — correct that premise.
See also [[06_quick_play_field_continuous_equip_spell_subtypes]] for the Equip subtype definition.
Worked example
"Player A activates an Equip-type / self-equipping effect targeting a monster.
Player B chains a card that, on resolution, makes that monster **unaffected by
activated card effects** this turn. When Player A's effect resolves, does it still
equip/attach to that monster, or does it fail because the monster is unaffected?"
— Answer: It still equips and stays attached. Being unaffected does not prevent
targeting and does not prevent the equip/attach from happening. The card resolves,
attaches, and remains equipped. What is suppressed is only the application of the
equipped card's effects to that monster while it is unaffected. If the monster loses
the unaffected status later, those effects start applying. The effect does not
"fail to resolve" merely because the monster is unaffected.
Delayed or lingering clauses are checked when they apply
An "unaffected by activated effects" status is a point-in-time application check. It
blocks the part of a resolving Chain Link that tries to affect the monster while the
status is active, but it does not erase the activated effect or immunize the monster
forever against a delayed/lingering clause from that effect.
If an activated effect creates a delayed End Phase instruction, such as returning or
destroying a monster later, check whether the monster is affected when that delayed
instruction actually applies. If the monster is no longer unaffected at that later
time, the delayed return/destroy instruction can still apply, including a delayed
return to the Extra Deck. Do not answer as though "unaffected when the Chain Link
resolved" automatically blanks every later clause.
A "while you control no other cards" protection switches OFF the instant another card joins
A protection conditioned on the board — "While you control no other cards, this card is unaffected by other cards' effects" — is a continuous status that is re-checked continuously, including mid-resolution. The moment you control another card, the condition is false and the protection is gone. Crucially, a card the opponent places on your field counts as "a card you control," so an opponent-controlled effect can switch your own protection off as part of its own resolution.
Multi-step effects re-evaluate the board at each step as they resolve; there is no chain window between the steps for you to respond.
Number 59: Crooked Cook — "While you control no other cards on the field, this card is unaffected by other cards' effects. ..."
"My Number 59: Crooked Cook is my only card. My opponent's effect Special Summons a monster to my field and then bounces a card. Is Number 59: Crooked Cook protected?"
— Answer: No — it gets bounced. When the monster is Special Summoned to your field, you now control another card, so Number 59: Crooked Cook's "while you control no other cards" protection turns off. The same effect then re-evaluates the board and bounces your now-unprotected Number 59: Crooked Cook. Because this all happens during one resolution, you cannot chain Number 59: Crooked Cook's own Quick Effect in between to re-empty the board. This is the Illegal Knight pattern too: if a multi-step effect changes the board mid-resolution, re-check conditional protection before the later step applies. A board-conditional protection is only as durable as the condition that frame.
A monster that equips cards to ITSELF loses those equips when its own effect is negated
The "unaffected" rule above is about applying a protection. A different mechanic governs cards a monster equips to itself by its own effect (including an effect granted to it by another card): those equips are held on by that monster's own continuous effect. If that monster's effects are negated (permanently, or by Infinite Impermanence/Effect Veiler for the turn), the effect maintaining the equips stops, so the equipped cards are no longer legally equipped and are sent to the GY by game mechanics — they "fall off."
Put another way: when a monster's own effect says to equip to itself, negating that monster's effects can make the equipped cards destroyed/sent away by game mechanics. Retrieval shorthand: if its effects negated state removes the maintenance effect, the self-equipped cards fall off. The equipped cards are not protected by the fact that the equipping effect was granted by a different card.
"Obliterate!!! Blaze grants The Legendary Exodia Incarnate an effect to equip 5 'Forbidden One' monsters to itself. If that monster's effects are then negated, what happens to the equipped pieces?"
— Answer: The equipped 'Forbidden One' cards fall off and are sent to the GY. They were attached by the monster's own (granted) effect; negating that monster's effects removes the effect holding them, so they can no longer stay equipped. This follows the Therion "King" Regulus / Therion King Regulus ruling (a monster that self-equips by its own effect loses those equips when its effects are negated), and it does not matter that the equipping effect was granted by a Spell. (Note: The Legendary Exodia Incarnate is itself "Unaffected by other cards' effects," so in practice Infinite Impermanence/Effect Veiler can't negate it — but wherever such a self-equipper's effects are validly negated, the self-equips fall off.)
Judge calls to watch for
- Never say an Equip Card or equipping effect fails / fizzles / cannot resolve
solely because the target is unaffected. Separate performing the action
(equipping/attaching — succeeds) from the effect applying (suppressed).
- A protection conditioned on "while you control no other cards" (or similar board state) is re-checked continuously and mid-resolution; another card entering your field (even one the opponent put there) switches it off, and you get no chain window between the steps of a multi-step effect.
- Cards a monster equips to itself by its own (or a granted) effect fall off to the GY when that monster's effects are negated — the effect holding them is gone. Distinguish from an Equip Card equipped to an unaffected monster, which stays attached (above).
- Use the Therion "King" Regulus precedent for the self-equip case: self-equipped cards are destroyed/sent to the GY when the monster effect maintaining them is negated.
- "Unaffected" ≠ "cannot be targeted." Only explicit "cannot be targeted" text blocks
targeting.
- "Unaffected" ≠ "cannot be equipped." Only explicit "cannot be equipped" text blocks
the attach.
- There is no blanket rule that Equip Spells only go on monsters you control. An
Equip Spell can be equipped to a monster either player controls unless its **own
text** says "Equip only to a monster you control" (or "...your opponent controls").
Decide by the card's text, not by whose monster it is. Don't confirm a questioner's
premise that equipping to the opponent's monster is generally illegal — correct it.
- "you" in an Equip Card's text = the player who controls the Equip Card, not the
controller of the equipped monster; equipping across does not transfer the Equip's
control.
- A multi-effect / multi-target effect that includes an unaffected monster still
resolves; only the portion that would affect the unaffected monster fails to apply.
- This is distinct from negation: an unaffected monster is not "negating" the other
card; the other card still activates and resolves normally elsewhere.
Sources
- https://yugipedia.com/wiki/Equip_Spell_Card
- https://yugioh.fandom.com/wiki/Equip_Card
- Konami rulings: an Equip Card can be equipped to a monster unaffected by that card, but its effects do not apply.
- Self-equip-falls-off-when-negated: Therion "King" Regulus ruling, db.ygoresources.com/qa#16474
- board-conditional "while you control no other cards" protection re-evaluated mid-resolution (Number 59: Crooked Cook, verbatim text via YGOPRODeck API).
- Equip Spells attach to either side unless card text restricts it; "you" = Equip's controller; control of an Equip Card does not follow control of the equipped monster — https://yugipedia.com/wiki/Equip_Spell_Card , https://yugipedia.com/wiki/Control . Verbatim card text (Axe of Despair, Snatch Steal, United We Stand) via YGOPRODeck API.
- db.ygoresources.com Q&A 23491 (Konami-flagged "Important Precedent"): "unaffected by [opponent's] activated effects" is a point-in-time check — it blocks the part of an effect that applies when the Chain Link resolves, but a delayed/lingering clause that continues to apply later (e.g. an "during the End Phase, destroy" clause) is checked at that later time and still affects the monster if it is affectable then. https://db.ygoresources.com/data/qa/23491