Hold Breath. The dreki can hold its breath for 30 minutes.

Pounce. If the dreki moves at least 20 feet straight toward a creature and then hits it with a claw attack on the same turn, that target must succeed on a DC 17 Strength saving throw or be knocked prone. If the target is prone, the dreki can make one bite attack against it as a bonus action.

Multiattack. The dreki makes two attacks: one with its bite or claw and one with its tail.

Bite. Melee Weapon Attack: +9 to hit, reach 5 ft., one target. Hit: 16 (2d10 + 5) piercing damage plus 4 (1d8) lightning damage, and the target is grappled (escape DC 16). Until this grapple ends, the target is restrained, and the dreki can't bite another target.

Claw. Melee Weapon Attack: +9 to hit, reach 5 ft., one target. Hit: 16 (1d12 + 5) slashing damage.

Tail. Melee Weapon Attack: +9 to hit, reach 10 ft., one target not grappled by the dreki. Hit: 14 (2d8 + 5) bludgeoning damage. If the target is a creature, it must succeed on a DC 17 Strength saving throw or be knocked prone.

Lightning Burst (Recharge 5–6). The dreki expels lightning in an 30-foot radius, centered on itself. Each creature in that area must make a DC 14 Dexterity saving throw, taking 42 (8d10) lightning damage and becomes paralyzed on a failed save, or half as much damage on a successful one and is not paralyzed.