Custodian

The  is a boss that was added on June 8, 2018, along with the Defender.

Design
The appears to be a heavily modified Defender, with its most apparent upgrade being to trap count. It now features 3 trap launchers per side, one central one and two behind it that are slightly bent outwards. It also possesses Defender's signature three top turrets but in a different arrangement; two are on the outer vertexes and one large one sits directly in the middle. One vertex is missing a turret,