Curse of Malfegor

Enchant Player
Whenever enchanted player discards a card, each
player loses life equal to its mana value.
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Nicol Bolas rewarded Malfegor's loyalty by granting
his insane minion the power to make others experience
the same humiliating and fiery darkness which had
ignited Malfegor's planeswalker spark: utter and
complete madness.