It looks like an Arena Closer which is the size of a level 50 tank with a Hunter barrel and two spiked lances mounted on circles, which are attached to the boss directly to the right and left of the Hunter barrel.
EX-TERM-MIN-ATE: Acts like a normal Arena Closer and chases down tanks while having the reload, bullet damage, speed, and penetration of a 7/7/7/7 level 45 basic Tank, but the bullet knockback of an Arena Closer. Used the most often.
Bug Bomb: A maze wall-colored rectangle marked "Bug Bomb" is set down, releasing 10 Disrupters and gives every tank in the room the Poisoned and Confused debuffs for 8 seconds.
Rat Poison: A green rectangle appears in the center. Tanks that touch it receive INSTANT death, but will be revived with 3/4 of their score instead of the usual half-level system. They will respawn in the room. It can be destroyed and it has the health of half an Alpha Pentagon.
Mimicry: The server forcibly closes. 10% chance to happen when it reaches 5% health.
- Before you ask, yes, this boss is a joke compared to the tank it's supposed to be.