Quest for the Goblin Lord is a uncommon Enchantment card from Worldwake (WWK), collector number 86. Current market price: $1.49 (foil $9.34), TCGplayer market prices via Scryfall.
Whenever a Goblin you control enters, you may put a quest counter on this enchantment. As long as this enchantment has five or more quest counters on it, creatures you control get +2/+0.