Set the gate clock to 7:30
With both hands and the rotor recovered, inspect the clock clue and set the Clock Tower Gate to 7:30. Enter the Movements and vacuum the ruby from the left window before operating the lift mechanism. Turning the machinery changes your position and makes that easy window detour less convenient. Ascend to the Belfry for the Overset Possessor’s clock battle.
Survive twelve waves and three Possessor phases
The encounter runs around a giant clock. Clear four enemy waves to force out the Possessor, then stun and vacuum it with a full Power Surge. Repeat after the eighth and twelfth waves. The Possessor’s exposed phases are the opportunities to damage it; catching ordinary ghosts alone will not end the fight.
Keep off the red clock hands and give Slammers room for their shockwaves. Later waves add Sneakers, armed Greenies, mummies and Robombs. Remove face coverings before flashing, lure mummies into collisions and avoid clustered bombs. The clock’s final stretch becomes less forgiving as more of its hands turn dangerous. Finish each wave methodically, then take the opening after the twelfth to capture the Possessor and recover the Dark Moon piece.
Collectible checklist
Old Clockworks gems — #13 Movements