Trampling Charge. If the ammut moves at least 20 feet straight toward a creature and then hits it with a gore attack on the same turn, that target must succeed on a DC 18 Strength saving throw or be knocked prone. If the target is prone, the ammut can make one bite attack against it as a bonus action.

Hold Breath. The ammut can hold its breath for up to 30 minutes.

Gore. Melee Weapon Attack: +8 to hit, reach 5 ft., one target. Hit: 18 (3d8 + 5) piercing damage.

Bite. Melee Weapon Attack: +8 to hit, reach 5 ft., one prone creature. Hit: 21 (3d10 + 5) piercing damage, and the target is grappled (escape DC 16). Until this grapple ends, the target is restrained, and the ammut can’t bite another target.

Noxious Gas (Recharge 5/6). The ammut exhales a 30-foot cone of gas which decays the flesh and rots the soul. Each other creature in the cone must make a DC 15 Constitution saving throw. On a failed save, they take 31 (7d8) necrotic damage, or half as much on a successful save.