Life Bond. When you regain Hit Points from a level 1+ spell, the steed regains the same number of Hit Points if you’re within 5 feet of it.

Otherworldly Slam. Melee Attack Roll: Bonus equals your spell attack modifier, reach 5 ft. Hit: 1d8 plus the spell’s level of Radiant (Celestial), Psychic (Fey), or Necrotic (Fiend) damage.

Bite. Melee Attack Roll: +7, reach 5 ft. Hit: 8 (1d8 + 5) Psychic damage.

Fell Glare (Fiend Only; Recharges after a Long Rest). Wisdom Saving Throw: DC 15 one creature within 60 feet the steed can see. Failure: The target has the Frightened condition until the end of your next turn.

Fey Step (Fey Only; Recharges after a Long Rest). The steed teleports, along with its rider, to an unoccupied space of your choice up to 60 feet away from itself.

Healing Touch (Celestial Only; Recharges after a Long Rest). One creature within 5 feet of the steed regains a number of Hit Points equal to 2d8 plus 5.

(2d8 + 5) hit points.