SkinWalker. If the Sliuk can kill a target with a tongue attack the target instantly dies as the Sliuk inserts its tongue and instantly devours its innards. The Sliuk can then slide into the creatures body and effectively wear them as a suit.

Ambusher. The Sliuk has advantage on attack rolls against any creature it has surprised.

Surprise Attack. If the Sliuk surprises a creature and hits it with an attack during the first round of combat, the target takes an extra 10 (3d6) damage from the attack.

Multiattack. The Sliuk makes two melee attacks.

Slam. Melee Weapon Attack: +6 to hit, reach 10 ft., one target. Hit: 10 (1d8 + 4) bludgeoning damage.

Lick. Melee Weapon Attack: +6 to hit, reach  5ft., two targets. Hit: 10 (2d8 + 4) Slashing Damage