You draw one card each time the enchanted creature deals damage to an opponent, no matter how much damage it deals or whether it was dealt in combat.
16-03-2018
wotc
If this Aura enchants an opponent's creature, you won't draw a card when that creature damages you. The creature has to deal damage to one of your opponents for the ability to trigger.
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.