Quote Originally Posted by Taejo View Post
Skratch - Watcher Tombs / Kraken Mines / Dead City
First Mate Ripper - Grog Beach / Skull Cove
Amra-zu - Tower of Mardrom / Arcanum Castle
Agrex - Halls of Valheim

These bosses will spawn after a specific type of mob is killed. Looking at the pattern, I'd be willing to bet that:

- Any skeleton can respawn into Skratch (WT, KM, Dead City)
- Any shark can respawn into Ripper (Grog, Skull Cove)
- Any giant demon can respawn into Amra-zu (Arcanum Castle, Tower of Mardrom)
- Any giant ice elemental can respawn into Agrex (CC, Oltgar, Valheim)
Yep can confirm Agrex spawn in crystal cavern in place of ice elemental near mini boss.