Incorporeal Movement. The specter can move through other creatures and objects as if they were Difficult Terrain. It takes 1d10 Force damage if it ends its turn inside an object.
Sunlight Sensitivity. While in sunlight, the specter has Disadvantage on ability checks and attack rolls.
Life Drain. Melee Attack Roll:  +12, reach 5 feet. Hit:  2d6 + 5 Necrotic damage. If the target is a creature, its Hit Point maximum decreases by an amount equal to the damage taken.