CON, DEX, or STR increases by 1.

Coocub have Darkvision out to a range of 60 ft.

You may gain 20 temporary HP on completing a long rest.

As an action, you may sniff the air around yourself to cast Detect Poison and Disease without using a spell slot. You have advantage on Perception, Nature, and Medicine checks made using smell.

When you successfully land an unarmed strike against a target, you may force the target to make a DEX saving throw against 10 + your STR modifier + your proficiency bonus. On a failure, the target is restrained by your sharp teeth and claws and takes 2d6 Piercing damage at the start of each of their turns for the duration of the restraint. The target may use both their action and their movement speed to try this save again.

Once per long rest, as an action, you may shriek continuously for up to 30 seconds. Every creature within 30 feet of you must make a CON save against 10 + your CHA modifier + your proficiency bonus. The creatures take 3d4+2 Psychic damage on a fail or half that on a success. Creatures who fail are deafened for one minute. Any creature with hearing who starts its turn within 30 feet of you while you are wailing must make this save.