Claws (Bite While Shapeshifted)

Melee Weapon Attack: +5 to hit, reach 5 ft., one target. Hit: 5 (1d4 + 3) piercing damage and the target makes a DC 11 Constitution saving throw becoming poisoned for 1 minute on a failure. The creature can repeat the saving throw at the end of each of its turns ending the effect on a success.

Scare (Quasit Form Only)

A creature within 20 feet that can see the quasit makes a DC 11 Wisdom saving throw. On a failure it is frightened for 1 minute. The creature can repeat the saving throw at the end of each of its turns ending the effect on a success. If a creature makes its saving throw or the condition ends for it it is immune to any quasits Scare for the next 24 hours.

Shapeshift

The quasit magically changes its form into a bat (speed 10 ft. fly 40 ft.) centipede (40 ft. climb 40 ft.) or toad (40 ft. swim 40 ft.) or back into its true form. Its statistics are the same in each form except for its movement speeds. Equipment it is carrying is not transformed. It reverts to its true form if it dies.