Boss Rush

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"We expect you to turn in a perfect performance!"

The Boss Rush is a special event that is activated upon the use of Terminus. During the event, every vanilla and Calamity boss spawn sequentially in a predetermined order. The bosses summoned are far stronger than in their original fights and have immensely buffed HP and damage, giving them all similar difficulties despite their usual distance in the game's progression. The Boss Rush can be deactivated at any time by using Terminus again.

Defeating the Boss Rush rewards the player with the Rock.

Progression[edit | edit source]

Upon starting the Boss Rush, bosses will spawn in a predetermined order that never changes. Only one boss will spawn at a time; the next boss will spawn once the prior boss is defeated. A total of 39 bosses will spawn during the Boss Rush. The bosses are divided into five Tiers, with each new Tier signified by a status message in the chat and a brief rest period.

If a boss cannot normally be summoned correctly, the game will attempt to change whatever is needed in order to summon said boss, such as changing the time or teleporting the player somewhere else in the world.

The order is as follows:

Boss Rush Progression
Tier Boss Health Notes
Tier 1
Queen Bee

3,150,000 / 4,410,000 / 5,071,500 / 7,276,500

Brain of Cthulhu

1,000,000 / 1,700,000 / 2,720,000 / 3,570,000

King Slime

3,000,000 / 4,200,000 / 4,200,000 / 7,770,000

Eye of Cthulhu

4,500,000 / 5,850,000 / 7,312,500 / 13,455,000

Sets the time to night (7:30 PM)
Skeletron Prime

1,100,000 / 1,650,000 / 1,980,000 / 2,392,500

Sets the time to night (7:30 PM)
Golem

1,300,000 / 1,950,000 / 4,425,000 / 6,900,000

Sets the time to day (4:30 AM)
Profaned Guardians

2,650,000 / 4,040,000 / 4,040,000 / 4,664,000

Sets the time to day (4:30 AM)
Eater of Worlds

2,500,000 / 3,500,000 / 4,550,000 / 4,900,000

Astrum Aureus

8,400,000 / 13,440,000 / 13,440,000 / 14,400,000

Sets the time to night (7:30 PM)
The Destroyer

2,500,000 / 3,750,000 / 4,687,500 / 6,000,000

Sets the time to night (7:30 PM)
Tier 2
The Twins

2,750,000 / 4,125,000 / 5,268,750 / 5,887,500

Sets the time to night (7:30 PM)
Bumblebirb

3,000,000 / 4,800,000 / 4,800,000 / 5,120,000

Sets the time to day (4:30 AM)
Wall of Flesh

4,500,000 / 6,300,000 / 11,970,000 / 16,380,000

Teleports the player to the Underworld
Hive Mind

3,350,000 / 5,360,000 / 5,360,000 / 5,760,000

Teleports the player to the Surface
Skeletron

1,600,000 / 3,200,000 / 4,000,000 / 4,480,000

Sets the time to night (7:30 PM)
Storm Weaver

3,670,000 / 5,872,000

Sets the time to day (4:30 AM)
Aquatic Scourge

10,000,000 / 16,000,000 / 16,000,000 / 17,600,000

Desert Scourge

16,500,000 / 26,400,000 / 26,400,000 / 28,000,000

Lunatic Cultist

2,640,000 / 3,300,000 / 4,675,000 / 6,875,000

Tier 3
Crabulon

11,000,000 / 17,600,000 / 17,600,000 / 16,000,000

Plantera

1,600,000 / 2,240,000 / 5,152,000 / 7,616,000

Ceaseless Void

200 / 400

The Perforators

2,700,000 / 4,320,000 / 4,320,000 / 4,800,000

Cryogen

3,000,000 / 4,800,000 / 4,800,000 / 5,120,000

Brimstone Elemental

6,500,000 / 10,400,000 / 10,400,000 / 11,200,000

Signus, Envoy of the Devourer

2,400,000 / 3,840,000 / 3,840,000 / 4,160,000

Ravager

6,370,000 / 9,650,000 / 9,650,000 / 10,280,000

Duke Fishron

2,900,000 / 3,480,000 / 6,438,000 / 12,267,000

Tier 4
Moon Lord

3,100,000 / 4,650,000 / 7,980,000 / 9,630,000

Astrum Deus

4,900,000 / 7,840,000 / 7,840,000 / 9,120,000

Sets the time to night (7:30 PM)
Polterghast

3,250,000 / 5,200,000 / 5,200,000 / 5,600,000

Sets the time to day (4:30 AM)
The Plaguebringer Goliath

3,700,000 / 5,920,000 / 5,920,000 / 6,400,000

Calamitas

5,200,000 / 8,320,000 / 8,320,000 / 8,800,000

Sets the time to night (7:30 PM)
Siren and Leviathan

9,600,000 / 15,360,000 / 15,360,000 / 16,480,000

Sets the time to day (4:30 AM)
The Slime God

8,200,000 / 13,120,000 / 13,120,000 / 14,160,000

Providence, the Profaned Goddess

12,500,000 / 20,000,000 / 20,000,000 / 24,000,000

Sets the time to day (4:30 AM)
Tier 5
Supreme Calamitas

2,100,000 / 3,360,000 / 3,360,000 / 3,680,000

Jungle Dragon, Yharon

3,700,000 / 5,920,000 / 5,920,000 / 6,400,000

Sets the time to day (4:30 AM)
The Devourer of Gods

9,200,000 / 14,720,000 / 14,720,000 / 16,000,000

The Devourer of Gods will be in its final phase

Boss Rush Curses[edit | edit source]

There are five curses that can be enabled through the configuration options. They are disabled by default. The curses impose restrictions on the player while the Boss Rush is active. They serve no purpose other than to challenge the player and offer no additional rewards.

  • The Accessory curse disables the sixth and seventh accessory slot gained through the Demon Heart and Celestial Onion.
  • The Health curse negates all positive life regen.
  • The Dash curse disables all dashes from items such as the Statis' Ninja Belt or Shield of Cthulhu.
  • The Xeroc curse gives all enemies a reddish tint and increases their movement speed in a similar manner as the Demonshade enrage.
  • The Immunity curse prevents the player from getting hit more than once within the span of five seconds. If the player is hit more than once within a span of five seconds, they will instantly die.

Notes[edit | edit source]

  • Many bosses in the Boss Rush will use their AI and functions normally exclusive to Expert, Revengeance, or Death Mode. This includes the Devourer of Gods' head instantly killing the player on contact, the Siren and Leviathan spawning simultaneously and immediately enraged, and more.
    • However, some AI and functions still change between modes such as Hive Mind's AI and the number of brothers spawned by Calamitas.
    • Several bosses are sped up due to the potential speed of the player.
  • King Slime can rarely spawn Rainbow Slimes when damaged.
  • Defeating any segments of the Eater of Worlds will kill the boss.
  • There is an additional Crystal and Rock Guardian for a total of five Profaned Guardians.
  • Providence performs both the Crystal and the Holy Ray attacks regardless of the biome she was spawned in.
  • Bosses slain during Boss Rush do not drop any items or currency.
  • The waiting time between the prior boss's death and the next boss spawning is 1 second during Tiers 1 through 3, which is increased to 3 seconds during Tier 4, and then to 6 seconds during Tier 5.
  • All wire-activated mechanisms are disabled during a Boss Rush.
  • Unlike the other bosses, the difficulty of Supreme Calamitas' battle is made easier in the Boss Rush compared to her usual fight.
  • The health of the bosses during the event only scales up with 2 people in multiplayer.
  • All mounts are disabled during the event.
  • All bosses are immune to all debuffs except Ichor, Cursed Inferno, and Enraged.

Tips[edit | edit source]

  • Many health and buff potions should be brought, as the Boss Rush can easily take over twenty minutes.
  • Despite being able to begin the Boss Rush at almost any point in the game, the player should definitely have end-game weapons and equipment before facing it if they hope to succeed.
  • Contact damage with any of the bosses and their projectiles/minions should be avoided as they can easily deal over 200 damage even with endgame armor.
  • Players should attempt to distance themselves from any floors or other solid tiles after defeating Providence, in order to maximize the amount of space available to them once Supreme Calamitas spawns and her arena generates.
  • Avoid the Devourer of Gods' head at all costs, as contact with it will instantly kill the player.
    • If the player killed Yharon midair, they must find a surface to stand on as the Devourer of Gods will otherwise charge towards them instantly killing them. Having an arena can solve this problem.

Trivia[edit | edit source]

  • The boss progression was based on a series of polls that took place in the Calamity Mod Discord server, gauging players' favorite bosses and the ones they found the most difficult, with the resulting total being used to determine the rush's order.
  • The Boss Rush Curses were inspired by the Pantheon Bindings from the game Hollow Knight. These Bindings would limit the stats of the player character and their abilities decently.

Messages[edit | edit source]

  • "Hmm? Ah, another contender. Very well, may the ritual commence!" (when started)
  • "Hmm? Oh, you're still alive. Unexpected and exhilarating, but don't get complacent just yet." (before entering Tier 2)
  • "Hmm? Persistent aren't you? Perhaps you have some hope of prosperity, unlike past challengers." (before entering Tier 3)
  • "Hmm? Your perseverance is truly a trait to behold. You've come further than even the demigods in a short time." (before entering Tier 4)
  • "May your skills remain sharp for the last challenges." (upon entering Tier 4)
  • "Hmm? So you've made it to the final tier, a remarkable feat enviable by even the mightiest of the gods." (before entering Tier 5)
  • "Go forth and conquer 'til the ritual's end!" (upon entering Tier 5)
  • "Hmm? You expected a reward beyond this mere pebble? Patience, the true reward will come apparent in time..." (after completing the Boss Rush)