Helm of the Ghastlord {3}{U/B}
Enchantment — Aura
Enchant creature
As long as enchanted creature is blue, it gets +1/+1 and has "Whenever this creature deals damage to an opponent, draw a card."
As long as enchanted creature is black, it gets +1/+1 and has "Whenever this creature deals damage to an opponent, that player discards a card."
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Cards that do something similar expected a card that isn't here?
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Snake Umbra 84%
$1.19#1470
"Enchanted creature gets +1/+1 and has "Whenever this creature deals damage to an opponent, you may draw a card.""