Ghost Touched

You learn to move things with your mind, granting you the following benefits:

• You learn the spell Speak With Dead and Unseen Servant. You can cast it without verbal or somatic components, but you must use the corresponding spell slot.
• As a bonus action, you can send your ghost friends to shove one creature you can see within 30 feet of you. When you do so, the target must succeed on a Strength saving throw (DC 8 + your proficiency bonus + Wisdom ability modifier) or be moved 5 feet toward you or away from you. A creature can willingly fail this save.
• You get an advantage on Arcana, Nature, or History rolls related to the undead.