Quest for Pure Flame 144 (Zendikar)

Whenever a source you control deals damage to an opponent, you may put a quest counter on this enchantment. Remove four quest counters from this enchantment and sacrifice it: If any source you control would deal damage to a permanent or player this turn, it deals double that damage to that permanent or player instead.

NM - $2.00
LP - $1.60
MP - $1.20
HP - $0.80
DMG - $0.70