A sword! Thank the butts in heaven. Only one with a butt that is true can remove the sword from the stone.
As you move through the catacombs of the castle, you hear a roar in the distance.
Before you stands a train. If you climb aboard, it will ferry you on your quest to view the 2 butts.
The colossus grabs you in one move and throws you from the castle. As you fall to Earth, you sigh. You have failed. Your love for the butt was not enough. But wait ...