The Time Keeper

"It's in this room that the Time K... No, it was in this room that... No, in this room the Time Keeper will... Hold on, where were we when?"

The Time Keeper is the first tier 2 boss in the game. She is encountered in the Clock Room.

Damage on a single hit is soft-capped at 15% of Time Keeper's maximum health.

First phase
In 1+ BSC, the Time Keeper goes straight to the second phase.

Second phase
Retains all of her attacks from the previous phase, some attacks are enhanced in this phase.

Third phase
Retains all of her attacks from the previous phase, some attacks are enhanced in this phase.

Vulnerabilities

 * Since there are short pauses between her basic attack combos, it is a good idea to stay just in range to bait her attacks, then move/roll away, then roll back in after she finishes the combo for a few hits.
 * The Sword Rain damage can be reduced by using Masochist.
 * Skills and weapons that can or  the Time Keeper are very effective in restraining her and opening her up to melee attacks.

Primary attacks
Slash combo
 * Each slash can be blocked with a shield or rolled through but parrying is the best option as it doesn't require any movement and can inflict effects from shields.

Shuriken combo
 * Each individual shuriken can be and send back for lots of damage.
 * When trying to jump over the shuriken the Time Keeper will track your movement and adjust her throws to hit you so it is not a foolproof strategy.
 * It is possible to dodge a five-shuriken combo by double jumping and rolling, but the timing is precise.
 * A turret can be used to block the shurikens.

Hook and slash
 * The initial hook can be blocked and, this will end the combo.
 * The hook can be jumped over but only after it has already been thrown as the Time Keeper will track your movement if you jump before it is thrown.
 * When hooked and rooted, the ends just before the slash attack so you can still block or  the slash.

Lightspeed
 * The attack is telegraphed by a glowing yellow line across the arena.
 * The attack can be blocked,, and dodge rolled.
 * Parrying the attack will stop the Time Keeper's movement.
 * It will also end the combo in the third phase.

Teleport
 * The teleport is always followed by a long-range attack like Hook and Slash, Shuriken Combo, Lightspeed and Shuriken Shield
 * All these attacks have similar counters so the teleport is a good warning to make you prepare for them.

Shuriken shield
 * The attack charge up is pretty long.
 * Even though this attack summons lots of shurikens, you are only in danger of getting hit by only one or two of the shuriken.
 * Best strategy is to just stand still and counter the one shuriken coming in your direction.

Weapons/Skills

 * She is susceptible to all status effects, like freezing, slowing and rooting. However, using them repeatedly will shorten their duration.
 * The, or any ice-related weapon/skill can be used to inflict these status effects.
 * A viable strategy is to hit her with a powerful weapon like the or the  when she is incapacitated.
 * Even slow weapons like the, the , and the will have enough time to land their swings.
 * along with the is a good way to cause massive damage to the Time Keeper.
 * The can likewise tackle her heads-on, but without a shield, it can be very risky.
 * Most of her attacks can be, so this is a valid strategy (Link to a Shield build strategy).
 * The and the  are good examples, as they leave controlling status effects upon a successful.
 * The gives the player a force field if a melee attack was, which can be useful against her melee combos.
 * can be very effective, as it can deal very high damage very quickly, due to the Time Keeper's fast sequence of attacks.
 * The can be used to drain her health at a decent rate, but the wide area of the Clock Room may reduce its effectiveness.
 * The can be used to easily keep up with the Time Keeper's repeated teleporting. Due to a glitch, it's possible to teleport out of her Hook and Slash attack if the javelin isn't in the player's inventory, creating a window for a massive punish, even larger than just dodging the attack.

Lore
Information about the Time Keeper can be found in a few lore rooms, mostly located in the Clock Tower.
 * A letter left by the Time Keeper indicates that she is repeating the same day over and over as if time was rewinding every day . Evident by her entries of executed infected civilians and monsters because they're all classified as "Day 1". It is also implied that her task makes her increasingly exhausted, as the number of executions decreases each day.

Trivia

 * The Time Keeper was first added in the Brutal update.
 * Before the Baguette Update, the Time Keeper was named 'The Assassin'.
 * The enemy derived from her is the Automaton, who imitates her phase 3 dash attack.
 * According to the transition loading screens added in the Baguette Update also, it appears that she requested the King of the island to build the Clock Tower, for unknown reasons.
 * For the second and third phases to activate, it is necessary that the Time Keeper teleports away from the player first. Because of this, if the player manages to deal massive damage in a short amount of time, it is actually possible to end the fight before she enters the second and/or third phase.
 * The same can be said for Conjunctivius because she cannot attack while stunned by a, and being the first boss, her stun duration is not reduced at all.
 * Sometimes she can freeze in her dashing animation when defeated while doing that attack.
 * She is the first female boss in the entire game.
 * Since the Pimp my Run Update, the Time Keeper will jump one last time to the center of the map after having her health depleted, pester on her repeated defeat, implying that she remembers all the other times the player has fought her, and then claim that "It won't end well...", only to escape via a portal.
 * She and the Giant are the only bosses that cannot be truly defeated in this sense. The Giant heals as he sinks into lava while The Time Keeper teleports away after being defeated.
 * This also refers to how she does not have perfect manipulation over time.