Pinkymod/Tundran Tunneler

The Tundran Tunneler is a Pre-Hardmode worm found in the Underground Snow biome after Skeletron has been defeated. It burrows through the ground to charge at the player and deal contact damage.

Bestiary Entry
Standard giant worm or digger, that has since adapted to survive in the harsh conditions of the underground tundra. It has developed a extremely thick, leathery skin in order to withstand the cold. Even then, ice crystals still grow on it. In order to sustain it's bodily functions in immense cold, it needs to feed often.