Corpse Eater Spider

Devil's Sight. Magical darkness doesn't impede the spider's darkvision.

Spider Climb. The spider can climb difficult surfaces, including upside down on ceilings, without needing to make an ability check.

Web Walker. The spider ignores movement restrictions caused by webbing.

Bite. Melee Weapon Attack: +4 to hit, reach 5 ft., one creature. Hit: 7 (2d8 + 3) piercing damage

(2d8) necrotic damage.The target's hit point maximum is reduced by an amount equal to the necrotic damage taken, and the spider regains hit points equal to the amount. The reduction lasts until the target until the target finishes a long rest. The target dies if its hit point maximum is reduced to 0.

Feast. The spider feasts on one dead creature, that isn't a construct, within 5 feet of it and instantly regains 6 (1d10) hit points.