Find all crow skulls in the ancient mines

Reach the end of the vortex like a paper boat down a drain

Solve world hunger (by killing Gluttony)

Clear away all those headstones cluttering up the graveyard

Be the David to Dhor's Goliath (i.e. kill the big guy)

Win the game of Conveniently-Placed Hydraulic-Operated Underground Whack-a-Mole (patent pending)

Ride the ghost horse all the way to the end

Kill the Phantom guarding the ancient mines

Pass your abandoned minecart driving test

Kill the tyrannical Scarecrow and liberate the crows

Smashing some crates with your head might solve the barn's puzzle..

Send a monster back to the grave