Neheb, Dreadhorde Champion 140 (War of the Spark)

Trample Whenever Neheb deals combat damage to a player or planeswalker, you may discard any number of cards. If you do, draw that many cards and add that much {R}. Until end of turn, you don't lose this mana as steps and phases end.

NM - $2.00
LP - $1.60
MP - $1.50
HP - $1.50
DMG - $1.50