# Vessels

## Thrall & Boss Spawn Chances

You can find Thralls and the Vessel Boss by mining Regular and Deepslate Ores in the world. (note - only naturally mined ores will count, manually placed ores do not). 

#### Thralls

By default Thralls have either a <mark style="color:orange;">1.6%</mark> chance to spawn from <mark style="color:orange;">Regular Ores</mark>, and a <mark style="color:blue;">2.4%</mark> chance from <mark style="color:blue;">Deepslate Ores</mark>.

When a Thrall or Boss spawns, a 2 minute cooldown will start, and no Thralls or Bosses can spawn during this period. You can check your cooldown with <mark style="color:green;">/mine thrallcd (/mine tcd)</mark>

#### Vessel Boss

The Vessel Boss has a 5% chance to spawn per completed requiem on your pickaxe.

If you have all 3 requiems completed, then the chance is further increased to a total chance of <mark style="color:blue;">22.5% to spawn</mark> (without any modifiers).&#x20;

If your previous requiem order was incorrect, or the first requiem slot is empty, the Vessel Boss will not spawn, but Thralls will continue to spawn.&#x20;