Rule 370.1.a.1

Modifying or replacing an event is the same as modifying or replacing that Game Action or change in state that generated that event. Example: Zhonya’s Hourglass reads in part “If a friendly unit would die, kill this instead. Heal that unit, exhaust it, and recall it.” A unit’s death being replaced by Zhonya’s Hourglass is the same as the kill action that caused that death not occurring. Example: A card reads in part “The next time an enemy unit would become Mighty this turn, banish it instead. Its controller plays a 3 [M] Mech unit token to its location.” A unit becoming Mighty being replaced by this effect means the unit never became Mighty—no effects that trigger on units becoming Mighty will trigger.