Incoporeal Movement. Can move through other creatures and objects as if they were difficult terrain. It takes 5(1d10) force damage if ends its turn in a wall. Sunlight Sensitivity. Spectre has disadvantage on attack rolls and Wisdom (perception) rolls that rely on sunlight while in sunlight.
Life Drain. Melee Spell Atatck: +4 to hit, reach 5ft, one creature. On Hit: 10 (3d6). Target must succeed a DC10 Constitution saving throw or it's HP max is reduced by damage dealt. Reduction lasts till the end of a long rest. A target dies if max HP is reduced to 0 this way.
Angry frustrated spirits that have been prevented from passing to the afterlife. They are condemned to walk the world forever with no connections to their previous lives.