"Mandatory" Does Not Decide Chain Placement — Trigger vs. Quick Does

Whether an effect can be added to the current Chain (as Chain Link 2 or higher) or must wait

for the next Chain is decided by the effect's category and Spell Speed — **trigger effect

vs. quick effect — not by whether it is mandatory or optional**. Mandatory only means you

cannot decline to activate it; it says nothing about when it goes on a Chain.

This is the axis players (and sometimes judges) conflate. See

Chain Resolution and SEGOC.

The two axes are independent

• Mandatory vs. optional → can you choose not to activate it? (Mandatory: no.) Irrelevant to

chain placement.

• Trigger effect vs. quick effect → where on a Chain it can go:

- A Trigger Effect (Spell Speed 1) cannot interrupt a resolving Chain. When its condition

is met during a Chain, it waits for the next open window and is placed onto a new Chain via

SEGOC. It is never Chain Link 2 of the Chain that triggered

it.

- A Quick Effect (Spell Speed 2+) can chain to the current Chain — it can be **Chain Link

2 or higher** of the very Chain it is responding to (see file 02).

Worked example — a mandatory quick effect as Chain Link 2

A mandatory Trigger Effect ("When your opponent activates a card or effect: draw 1 card",

Spell Speed 1) cannot be Chain Link 2 of the chain it responds to — it activates on the

next chain via SEGOC.

A mandatory Quick Effect — e.g. Light and Darkness Dragonlord's "When a card or effect is

activated (Quick Effect): You must …" — can be Chain Link 2 of the current chain, because

it is a Quick Effect (Spell Speed 2). It being mandatory does not change that; "mandatory"

only removes the option to decline.

So the rule "mandatory triggers are placed before optional ones" applies to **trigger effects

building a new chain under SEGOC — it is not** a license to staple every mandatory effect onto

the current chain. A mandatory effect that is a trigger effect still waits for the next chain.

Judge calls to watch for

• Don't reason "it's mandatory, so it goes on the current chain." Ask: is it a Quick Effect

(can chain to the current chain, CL2+) or a Trigger Effect (waits for the next chain via

SEGOC)?

• SEGOC's "turn player's mandatory triggers first" ordering governs **trigger effects forming a new

chain**, not whether a quick effect may respond within the current chain.

• "Mandatory" and "optional" affect only whether activation can be declined — never chain

placement or Spell Speed.

Sources

• Konami Official Rulebook / Yugipedia Spell Speed, Chain — Spell Speed governs what can chain

to the current Chain; trigger effects (SS1) cannot interrupt a resolving Chain.

• See corpus #02 (quick effects respond as CL2) and

#08 (mandatory triggers via SEGOC on a new chain).

• The Judges' Lounge thread, Oct 2024 (mandatory effect as CL2; Light and Darkness Dragonlord) —

used only to locate the topic; verified against the rules above.