Feat UtilityCorellon's Grace
Corellon's grace allows you to move when others take action.
Encounter Channel Divinity, Divine
Immediate Interrupt Personal
Trigger: A creature within 10 squares of you spends an action point to take an extra action.
Effect: You take a move action.
Special: You can use only one channel divinity power per encounter.
Published in Player's Handbook, page(s) 194, Class Compendium.