Relic Bun-Bun is a boss enemy that has a 100% chance to apply the Curse effect to your cats. Cursed cats are unable to use their anti-trait abilities (Massive Damage, Weaken, etc.) for a short period of time, but can still use neutral abilities. Despite its appearance, Relic Bun-Bun is not considered Floating.
Other than what is stated above, this enemy is very similar to Mecha-Bun. It is different in that it deals half as much damage, gets knocked back half as many times, has longer effective range and moves slower.
With huge dps, Omni-strike, a 10sec curse, and 3 million hp, this enemy is extremely dangerous. Use tanky units and anti-Relics that can outrange him like Ultimate Catman, Awakened Musashi, and Awakened Mina. Slapstick Cats can be very helpful and Primordial Cat can as well since Slapstick can deal good damage to Relic Bun-Bun and Primordial can be a good meatshield.
An unstoppable artifact who mercilessly crushes any intruder into the realm of the ancients. The prophecies speak of some who can resist the dark curses this guardian places on its foes.