Clock Tower is an area of Dracula's Castle. Its Mirrors of Life are in Foundry Apex, Mechanic's Ascent and Eastern Summit, and the Ferryman's Wharf is on Forgotten Bridge. 7 clocks here slow time when you strike them: 2 in Clock Keeper's Atrium, 2 in Eastern Summit, and 1 each in The Gauntlet, Steps of Time and Bridge of Haste.
Isaac is fought in Heart of the Clock, with Eastern Summit as the nearest Mirror of Life, and defeating Isaac gives The Zealot and Chronomantic Dive. Talos is fought in Throne of the Builder, with Foundry Apex as the nearest Mirror of Life, and defeating Talos gives The Builder and Fist of Talos.
Chests hold the Phantom Ring in Western Ascent, the Moonlit Shard in Path of the Builder, the Sinister Rune in Eastern Access Shaft, and the Hollow Bone and Vile Trinket in Daedalus Crossing. The weapons include the Claymore in The Way of the Fist, the Chauve-Souris in Heart of the Clock, the Fists of Talos in Builder's Bureau and the Halberd in Mechanic's Ascent. Look for 3 Brave Heart Fragments and 3 Wise Heart Fragments, where 4 make one upgrade of 20, plus 1 ATK book, 2 DEF books, 14 XP statues worth 350 XP each, and 36 Secret Areas, 15 of them with something inside.
Exits lead to Main Hall from The Path of the Clock Keeper, the Library from Forgotten Bridge, and Master's Quarters from Master's Quarters Approach. You meet the Ferryman in Mechanic's Ascent. Equip Soul Harvest before you use the glowing clock gate on Clock Tower Bridge. Without it, Rose is sent into Death's trap and the bad ending plays. Skeleton archers, harpies, golems and medusa heads are among the enemies here.