Tremendous Rex is a massive Ramtaurus-type Saurian who serves as the boss encounter during the final round of the Cistern of Slaughter on Promethea.


Tremendous Rex is the most prized exotic creature in the Cistern of Slaughter arena on Promethea.



  • Tremendous Rex has the following attacks:
    • Blade Barrage - fires saw blades from the launchers on the sides of its face.
    • Head Smack - swings its head at melee range.
    • Jump Stomp - jumps when the character gets too close to knock them back.
  • Due to its immense size, it has limited mobility in the arena.


  • Tremendous Rex has an increased chance to drop the legendary Lyuda sniper rifle.

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