Keen Sense
Enchantment — Aura
Enchant creature
Whenever enchanted creature deals damage to an opponent, you may draw a card.
Crovax sensed that Mirri wasn't ready for the curse taking hold of her. Weeping in his heart, he fled.
Jim Nelson
Planar Chaos (PLC)
• #152Rulings
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.
(wotc • 2018-03-16)
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.
(wotc • 2018-03-16)
Rulings
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.
(wotc • 2018-03-16)
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.
(wotc • 2018-03-16)