It would look like a giant cube with eyes painted on each side. The top would open and a clown would pop out.

Ability 1:
It would retreat into its box and do a quick hop, damaging players beside it.

Ability 2:
It would retreat into its box for a second then pop back out and toss some bombs around. The bombs would explode distance away from it so standing near it would keep you safe but moving away would cause you to get hit.

Ability 3:
It would retreat into its box and start rotating while the eyes on the sides emit lasers. You have to Jump over them or dodge through them to avoid taking damage

The abilities should look very similar so they can surprise the player. Quick reacting and dodging would be necessary to survive.