|Knockback||7.5 (Very Strong)|
|Use time||17 Very Fast|
|Tooltip||Fires blazing, hyper, and sunlight blades|
Gives the player the tyrant's fury buff on enemy hits
This buff increases melee damage by 30% and melee crit chance by 10%
|Grants Buff||Tyrant's Fury|
|Buff duration||5 seconds|
|Buff tooltip||30% increased melee damage and 10% increased melee crit chance|
The True Tyrant's Ultisword is a craftable post-Moon Lord broadsword that autoswings. On each swing it fires one of three projectiles, chosen at random. Each projectile can pass through walls and hit 5 times before dissipating, and their piercing abilities vary as a result of their different damage-dealing speeds. None of the projectiles fired by the Ultisword can home in on enemies who are behind walls, nor can they chase enemies if inside a wall. If not chasing a foe, the projectiles will gradually slow down and stop similar to those fired by the Death Sickle.
Striking an enemy with the Ultisword itself has a 50% chance to grant the Tyrant's Fury buff to the player, increasing melee damage by 30% and melee critical strike chance by 10% for 5 seconds. The blade also inflicts Poisoned and Venom debuffs for 5 seconds and 2.5 seconds respectively.
Its best modifier is Legendary.
|Blazing Phantom Blade||Slightly homes into enemies.||On Fire! (3 seconds)|
|Hyper Blade||Dramatically homes into enemies.
Has a hit cooldown of 4.
|Cursed Inferno (2 seconds)|
|Sunlight Blade||Does not home into enemies.
Has a hit cooldown of 3.
|Holy Flames (3 seconds)|
|Tyrant Yharim's Ultisword||1|
|Core of Calamity||1|
|True Tyrant's Ultisword||1|
- The term “Ultisword” in the weapon’s name is a portmanteau, combining “Ultimate” and “Sword”.
- Yharim, referred to as the Tyrant in this weapon's name, is a significant figure in the Calamity Mod's lore.