8 Ball

At the start of his turn, 8-Ball rolls three d20s and records the numbers. Before the next dawn, he can replace any attack roll, saving throw, or ability check made by a creature he sees with one stored roll. He can do this after seeing the initial roll.

8 Ball has advantage on saving throws against spells and other magical effects.

Creatures starting turn here make DC 17 Wis save or suffer disadvantage on attacks until next turn.

8 Ball ignores difficult terrain. Can move across liquids, walls, and ceilings.

As long as Bill Cipher isn't destoyed in the Nightmere realm this creature reforms with full hp at dawn.

When attacking a creature, that has been attacked by another Henchmaniacs his attacks gain the following benefits

If Bill Cipher uses his Sacrifice action 8 Ball grants Bill Cipher his prophetic powers. For 1 minute, whenever Bill or an ally rolls a d20, they can replace the result with a 10.

8-Ball makes three attacks

Melee Spell Attack: +9 to hit, reach 10 ft., one target. Hit: 21 (4d6+4) force damage + 7 (2d6) psychic damage . On a Critical hit roll a

Only when an Bill Cipher uses his Combo attack action 8 Ball can and must use this action

8-Ball and Bill Cipher warp reality around one creature within 30 ft. The creature must make a DC 23 Charisma saving throw. On a failed save the target takes 66(12d10) force damage and suffer the effects of the maze spell. If the target succedes it takes only half damage.

8 Ball teleports 30 ft. to a space within 5 ft. of another Henchmaniacs or Bill Cipher.

When a creature within 60 ft. makes an attack roll, save, or check, 8-Ball forces it to reroll.