Replacement Effects are applied before any qualifying event has actually occurred.
§ 370.1.c Core Rules PDF (officieel)
§ 370 A Replacement Effect can alter the typical flow of play, including other cards' executions.
§ 370.1 Replacement Effects apply to any event or instruction that qualifies for their application. A Replacement Effect will specify the circumstances by which an event or instruction will qualify to be replaced.
