It doesn’t matter what the creature dealt damage to or if that damage was combat damage.
24-01-2013
wotc
You can’t choose a creature that hasn’t yet dealt damage during the turn as the target of Executioner’s Swing, so in most cases it’s not possible for Executioner’s Swing to reduce the amount of combat damage a creature deals. (If a creature has double strike, you could cast Executioner’s Swing after it deals first-strike damage but before it deals regular combat damage.)
Random a card of Magic: The Gathering (MTG), but you can also roll the D20 dice, random a Planeswalker, have fun with the random rules and more.