Primal Amulet
Primal Amulet {4}
Instant and sorcery spells you cast cost {1} less to cast.
Whenever you cast an instant or sorcery spell, put a charge counter on Primal Amulet. Then if there are four or more charge counters on it, you may remove those counters and transform it.
Latest set: [XLN] Ixalan ( R · #243 )