Thunderstone Quest from AEG

Thunderstone Quest is the third version of Mike Eillott's best-selling deckbuilding game of heroic adventure. Players build a deck of cards representing an adventuring party and explore a dangerous dungeon earning treasure and recovering powerful magic items. After enough keys are discovered the Guardian is unlocked and the players have a final turn to try and defeat the Guardian. The player who scores the most victory points throughout the game is the winner!