Chronomantic Dive, Chauve-Souris · Isaac · Reward orb

Defeat Isaac at Heart of the Clock in Clock Tower and complete the post-battle scene. Absorb the reward orb to obtain Chronomantic Dive and Chauve-Souris; the marked weapon chest also becomes accessible. Both reward locations require this battle to be completed. The first encounter in Main Hall does not award Chronomantic Dive.