Rakdos, Lord of Riots

Legendary Creature — Demon - (mythic)

You can't cast this spell unless an opponent lost life this turn.
Flying, trample
Creature spells you cast cost  less to cast for each 1 life your opponents have lost this turn.

Price

tcgplayer 1.3

cardmarket 1.07

cardkingdom 1.49

cardsphere 1.53

manapool 0.67