Underborer

 is a Tier 5 tank that upgrades from Undersniper, Undergunner and Hybrid Borer at Level 60.

Design
The looks very similar to Undergunner but with longer barrels, similar in appearance to the front guns of.

Technical
The front cannons fire identically to Borer while the drone spawner creates Underseer sunchips.

Trivia

 * This tank is the sunchip-using counterpart of the Discoverer.