Melee | Magic: The Gathering
Formats Melee is Legal in
Official Oracle Text for Melee
You choose which creatures block this combat and how those creatures block.
Whenever a creature attacks and isn't blocked this combat, untap it and remove it from combat.
Official Rulings for Melee
9/20/2013 : If a turn has multiple combat phases, this spell can be cast during any of them as long as it's before the beginning of that phase's Declare Blockers Step.