Quest for Pure Flame is a uncommon Enchantment card from Zendikar (ZEN), collector number 144. Current market price: $0.39 (foil $2.73), TCGplayer market prices via Scryfall.
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.