The Enlightened Skeleton has disadvantage on all ability checks to Charisma.

The Enlightened Skeleton is proficient in Arcana as well as one other skill.

The Enlightened Skeleton can speak Common, Infernal, and one language of your choice.

The Enlightened Skeleton has Darkvision up to 60 feet.

The Enlightened Skeleton gets +2 Con, +1 Wis, and +1 Dex.

The cold touch of death still surrounds you. The Enlightened Skeleton can cast Chill Touch at will.

The Enlightened Skeleton is immune to poison and disease.

The Enlightened Skeleton is vulnerable to radiant damage. It can also be turned with a Turn Undead spell.

If unarmed and not using a shield, you can "unarm" yourself and use your arm as a club doing 1d6+Str bludgeoning damage.

At level 5, once per long rest, if an attack would bring you to 0 HP and doesn't kill you outright, it only brings you to 1 HP. Your body becomes a pile of bones, is prone, and acts as if the Feign Death spell has been cast on it. On your turn, you can use your full movement to put yourself back together, keeping your arm as a Bone Club if necessary.