Rathtar

Armor Class 16 · Hit Points 153 (18d10 + 54) · Speed 40 ft.

Unhindered Movement (Trait). The rathar's movement speed is not reduced while moving with a grappled creature.

Multiattack (Action). The rathtar can use its Consume and then make four flailing arm attacks. Alternatively, the rathtar can make four attacks: two with its grasping tentacles and then two with its bite.

Bite (Action). The rathtar's gullet can hold only one Large creature or up to two Medium or smaller creatures inside it at a time. If the rathtar takes 20 damage or more on a single turn from a creature inside it, the rathtar must succeed on a DC 18 Constitution saving throw at the end of that turn or regurgitate the swallowed creatures, which fall prone in a space within 10 feet of the rathtar. If the rathtar dies, the swallowed creatures are no longer restrained by it and can escape from the corpse using 5 feet of movement, exiting prone. Melee Weapon Attack: +9 to hit, reach 5 ft., one target. Hit: 14 (2d8 + 5) kinetic damage, and the target is swallowed if it is a Medium or smaller creature. A swallowed creature is blinded and restrained, has total cover against attacks other effects outside the rathtar, and takes 14 (4d6) acid damage at the start of each of the rathtar's turns.

Flailing Arms (Action). Melee Weapon Attack: +9 to hit, reach 10 ft., one target. Hit: 8 (1d6 + 5) kinetic damage, and the target is grappled (escape DC 16) if it is Medium or smaller. Until the grapple ends, the rathar can't use this arm on another target. The rathtar has ten arms and can have up to four creatures grappled at a time.

Consume (Action). The rathtar moves up to its speed. While doing so, it can enter Large or smaller creatures' spaces. The first time the rathar enters a creature's space, the rathtar can make bite attack against that creature. If the attack misses, the creature is pushed 5 feet back or to the side of the rathtar, takes 9 (2d8) kinetic damage, and is knocked prone.

Grasping Tentacles (Action). Melee Weapon Attack: +9 to hit, reach 15 ft., one target. Hit: 12 (2d6 + 5) kinetic damage. If the target is a Medium or smaller creature, it must also make a DC 17 Strength saving throw. On a failed save, the target is pulled into an unoccupied space within 5 feet of the rathtar. The rathtar has two grasping tentacles.