Last Updated: 2026-10-09

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420.4. Some Abilities trigger when cards are played or otherwise check whether cards have been played.

420.4.a. Any such triggered abilities trigger when the act of playing the card has been completed by the resolution of the card.
420.4.a.1. If a game effect prevents the resolution of the card--for example, because the card was countered--abilities that trigger on playing cards will not trigger. See rule 426. Counter for more information.
420.4.b. Non-triggered abilities and conditional clauses that check cards being played do so by means of referencing whether said cards have been Finalized. Example: A player plays a spell, which is countered by Defy. Any Legion abilities of game objects controlled by that same player will be active. Example: A player plays a spell, which is countered by Defy. If that player plays Battering Ram and has played no other cards that turn, it will cost [4] Energy.
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