Boss Rush - Official Calamity Mod Wiki

The Boss Rush is a special event that is activated upon the use of Terminus. Although it can be summoned at any point in the game, it is recommended to be fought after all other bosses are defeated. During the event, every vanilla and Calamity boss spawns sequentially in a predetermined order. The bosses summoned have immensely buffed HP and damage and use modified AI, 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.

Cryogen - Calamity Mod Wiki

boss rush item) what is this? cal/cal-vanitys wiki dont have this : r/Calamitymod_

Brimstone Elemental - Calamity Mod Wiki

Wall of Flesh - Official Calamity Mod Wiki

You Guys got any tips? I'm playing in Revengeance mode and got stuck on this boss : r/CalamityMod

JUST DEFEATED CALAMITY DEATH MODE BOSS RUSH!!!! : r/CalamityMod

Boss Rush - Calamity Mod Wiki

They are truly the same : r/CalamityMod

Calamity Boss Rush, D-Mode Melee

Profaned Guardians - Official Calamity Mod Wiki

Calamity's Verboten One Accessory is perfectly balanced