Hold Breath. The subchief can hold its breath for 15 minutes.

Spellcasting. The subchief is a 5th-level spellcaster. Its spellcasting ability is Wisdom (spell save DC 13, +5 to hit with spell attacks). It has the following cleric spells prepared:

Cantrips (at will): light, sacred flame, spare the dying, thaumaturgy

1st level (4 slots): command, guiding bolt, purify food and drink

2nd level (3 slots): hold person, lesser restoration, silence

3rd level (2 slots): bestow curse, dispel magic

Tooth Dagger. Melee Weapon Attack: +4 to hit, reach 5 ft., one target. Hit:4 (1d4 + 2) piercing damage.

Jaws of Semuanya (Recharge 5–6). The subchief invokes the primal magic of Semuanya, summoning a spectral maw around a target it can see within 60 feet of it. The target must make a DC 13 Dexterity saving throw, taking 22 (5d8) piercing damage on a failed save, or half as much damage on a successful one. A creature that fails this saving throw is also frightened until the end of its next turn.