Purple worm

Purple Worms are enormous voracious beasts that tunnel through solid rock deep in the Underdark. They are often used by the Kryn Dynasty to travel vast distances underground and cause mass destruction.

Vox Machina fought purple worms in Brimscythe's former lair.

After asking some of the guards stationed at Felderwin, The Mighty Nein learned about the Kryn assault and their expedient getaway via purple worm.

The Mighty Nein traveled down the tunnels created by the purple worms to get to Xhorhas.

The Mighty Nein saw multiple purple worms shoot out of the ground while running towards the Chantry of the Dawn.