You possess a deep understanding of spirits and the ties that bind them to the mortal world.
With your urging, the spirit of a recently dead person will speak briefly with you. You can cast speak with dead . The body must be within three miles of where it died, and must not have died more than a day ago. You do not require a complete body as the ability speaks with the spirit and needs no corporeal connection. You can’t do so again until you finish a short or long rest.
At the Narrator’s prerogative, you could also use this power to communicate with uneasy spirits who have not yet moved on, regardless of how long ago they died.
Using this power against undead, or in any combat situation for that matter, is possible but very difficult. By expending this power as an action, you can control an undead creature you can see until the end of your next turn, as the dominate monster spell, if it fails a Wisdom save (DC 8 + your proficiency bonus + your Intelligence, Wisdom, or Charisma modifier). Alternatively, you can call up the spirit of a creature whose body you can see that died in the past five minutes. It does not receive a save to resist. Its spirit manifests in a space you choose within 25 ft. of you, and performs a single attack of your choice as if it were still alive, then disappears.