joke enemy
i looked at the unstoppable enemy joke idea and got my own idea.
Ticking Time Bomb
HP: 9223372036854775807
Speed: Extremely Slow (takes 15+ minutes to travel to exit)
Defense: 100%
Immunities: Hidden, Ghost, Explosion, Freeze, Energy, Burn, Lead, Fly
Abilities: None
Spawns at Wave 1 in any mode
The idea is that the enemy acts as a timer. It would take 15+ minutes to reach the exit, but if it does it's basically a guaranteed death. So you need to beat the major boss before the Ticking Time Bomb reaches the exit.
The Ticking Time Bomb is completely black and uses ROBLOX R6 animations.