The Time Keeper

The Assassin is the third boss in Dead Cells. She was added in the Brutal update. The Assassin is found in the Clock Room which can be reached from The Clock Tower or The Forgotten Sepulchre.

On her first death, The Assassin will drop a Boss Source Cell and the blueprint for Ice Shock. Subsequent deaths will drop additional blueprints in the order given in the infobox (however, if the player misses a blueprint or takes it but fails to turn it in to the Collector, the blueprint will reappear until it is successfully turned in, preventing blueprints after it from appearing for the duration).

First Phase

 * The Assassin performs one slash with her sword.
 * The Assassin throws one shuriken forward.
 * The Assassin throws a hook that, if hit by, pulls the player to the assassin and roots them in place, followed by a powerful blow.
 * The Assassin teleports a short distance away from the player (often used before shurikens, hook or dash)

After reaching around 70% health, the Assassin conjures a shield of spinning shurikens and pushes the player outward, after which the second phase begins.

Second Phase

 * The Assassin performs a two-hit combo with her sword.
 * The Assassin throws three shurikens in a quick succession.
 * The Assassin performs a dash attack through the entire room.
 * The Assassin throws a hook that, if hit by, pulls the player to the assassin and roots them in place, followed by a powerful blow.
 * The Assassin teleports a short distance away from the player (often used before shurikens, hook or dash)

After reaching around 35% health, the Assassin teleports away and says "Let's finish this" in a cutscene, before conjuring another circle of shurikens and entering the third phase.

Third Phase

 * The Assassin performs a three-hit combo with her sword.
 * The Assassin throws five shurikens in a quick succession.
 * The Assassin performs two dash attacks one after another.
 * The Assassin throws a hook that, if hit by, pulls the player to the assassin and roots them in place, followed by a powerful blow.
 * The Assassin teleports a short distance away from the player (often used before shurikens, hook or dash)
 * Swords fall on the player's location and randomly around the room.

Attacks

 * Understanding the attack pattern is the first step to beating The Assassin
 * All of her attacks can be roll-dodged, including the fallen swords.
 * She is susceptible to all forms of crowd control, like freezes, slows and Bear Trap.
 * The blow following the hook-pull can be blocked or parried with a shield, despite the player being rooted in place.
 * Getting hit by the three-hit combo in the last phase can be deadly, because the hits stun the player just long enough for her to land the next blow(s).

Weapons/Items

 * As she can be frozen, you can use this and hit her with a massive damage weapon, like Cursed Sword or Heavy Crossbow
 * Phaser and Assassin's Dagger is a good way to cause massive damage to The Assassin
 * Also, parrying most of Assassin's attacks is a good way to beat her, as seen in this video Shield build strategy