If there's any creatures with First or Double Strike involved in combat, then as the combat damage step starts, only those creatures will deal. An explanation of the " First strike " and " Double strike " abilities in the Magic: The Gathering Trading Card. Double strike is an evergreen keyword ability that allows a creature to deal combat damage twice per combat phase — once during the first combat damage step Last Used : Evergreen. After that step, instead of proceeding to the end of combat step, the phase gets a second combat damage step. But the double strike guy? Well this question is actually a layers question. After that step, instead of proceeding to the end of combat step, the phase gets a second combat damage step. But what exactly ARE they?