Aleksipug

Last Attempt. When an aleksipug dies, it explodes into slime. All non-fiend creatures in a 30-foot radius must make a DC 17 Dexterity saving throw, taking 36 (8d8) acid damage on a failed saving throw, or half as much on a successful one.

Many Eyes. The aleksipug has advantage on Wisdom (Perception) checks that rely on sight.

Multiattack. The aleksipug makes four tentacle attacks or two claw attacks and one bite attack.

Bite. Melee Weapon Attack: +8 to hit, reach 10 ft., 1 target. Hit: 36 (7d8 + 5) piercing damage. 

Claw. Melee Weapon Attack: +8 to hit, reach 15 ft., 1 target. Hit: 21 (3d10 + 5) slashing damage and the aleksipug can choose to grapple the creature (escape DC 15). While grappled in this way, the target takes 5 (1d10) slashing damage at the start of each of its turns. The aleksipug has two claws, therefore being only able to grapple two creatures at a time. If a claw is being used to grapple a creature, instead of making a claw attack with that claw, the aleksipug can deal the initial claw damage to the creature grappled by the claw.

Tentacle. Melee Weapon Attack: +8 to hit, reach 15 ft., 1 target. Hit: 21 (3d10 + 5) bludgeoning damage and 4 (1d8) piercing or slashing damage (aleksipug's choice).