Armor Class undefined
Hit Points 5 + 10 per spell level (the steed has a number of Hit Dice [d10s] equal to the spell's level)
Speed 60 ft., fly 60 ft.
Senses passive Perception 11
Languages telepathy 1 mile (works only with you)
Challenge —
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. m Bonus equals your spell attack modifier, reach 5 ft. Hit: 1d8 + summonSpellLevel of Radiant (Celestial), Psychic (Fey), or Necrotic (Fiend) damage.
Fell Glare (Fiend Only; Recharges after a Long Rest). wis DC equals your spell save DC, one creature within 60 feet the steed can see. 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 + summonSpellLevel.
Player's Handbook (2024), p. 273