Comprehensive Rules
500.5
When a phase or step ends, any effects scheduled to last âuntil end ofâ that phase or step expire. When a phase or step begins, any effects scheduled to last âuntilâ that phase or step expire. Effects that last âuntil end of combatâ expire at the end of the combat phase, not at the beginning of the end of combat step. Effects that last âuntil end of turnâ are subject to special rules; see rule 514.2.