Rule 480.1

When an effect begins applying, it establishes a time for which it is compared against other Game Effects for purposes of resolving Layered effects as its Timestamp.

• 480.1.a Timestamps are not rote values.
• 480.1.b Timestamps are relative comparisons between effects and when they began applying to the game.
• 480.1.c Timestamps are not referenced by Game Effects in any way. They are only used to finalize layered effects.

Official Core Rules