
Whenever you cast a Spirit or Arcane spell, regenerate target creature.
Horizon Seed has 2 printings, first in Champions of Kamigawa (2004). EDHREC ranks it #27,290 among Commander cards. It appears most in Celestial Kirin decks (255 on EDHREC).
Deck counts from EDHREC.
Cards that show up in the same decks on EDHREC.