Nuclear

The  is a Testbed Misc tank.

Design
The tank looks very similar to, having a shrunken Machine Gun-style barrel on the front of it and nothing else.

Technical
This tank and its branches have the strange ability to necromance shapes based on their bullets. Unlike the Underseer branch though, it does not turn them into controllable drones and instead just turns them into stationary copies of the bullet that infected them. The 's bullets are circular so it is able to necromance eggs into bullets.