leaping shadow. The Yvth can leap 35 feet if on a elevated platform.

poisonous gas. The Yvth creates a sphere of poisonous gas which will do 2d4 poison damage for 3 rounds.

Pounce. If the Yvth 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 13 Strength saving throw or be knocked prone. If the target is prone, the Yvth can make one bite attack against it as a bonus action.

fearsome roar. any creature within 15 feet of the Yvth has to make a DC 15 will save or be frightened.

Bite. Melee Weapon Attack: +5 to hit, reach 5 ft., one target. Hit: 7 (1d8 + 4) piercing damage.

Claw. Melee Weapon Attack: +5 to hit, reach 5 ft., one target. Hit: 6 (2d6 + 3) slashing damage.