Giant Slayer

Duel- {1}, turn Giant Slayer face up: Put a colorless Equipment artifact token onto the battlefield attached to Giant Slayer. It has "Equipped creature has '{t}, Sacrifice this permanent: Equipped creature deals 18 damage to target creature." and "Equip- Pay 1 life." Activate this ability only if Giant Slayer is blocking a creature with greater power than it.(Cast this creature face-down as a 2/2 creature.)
The ground spat its fiery breath, and the colossus was no more.