Multiattack

The rift swine makes one Tusk attack and two Tentacle attacks, or it makes three Warping Bolt attacks.

Tusk

Melee Weapon Attack: +7 to hit, reach 5 ft., one target. Hit: 13 (2d8 + 4) slashing damage.

Tentacle

Melee Weapon Attack: +7 to hit, reach 10 ft., one target. Hit: 11 (2d6 + 4) bludgeoning damage. If the target is a Medium or smaller creature, it is grappled (escape DC 14). Until this grapple ends, the target is restrained. The rift swine has two tentacles, each of which can grapple only one target.

Warping Bolt

Ranged Spell Attack: +4 to hit, range 60 ft., one target. Hit: 11 (3d6 + 1) force damage, and the target must succeed on a DC 14 Constitution saving throw or have disadvantage on attack rolls as reality-warping energies temporarily distort its body.