Seijin of the Awakened Souls

Holy (Whenever you cast an instant or sorcery with mana value 3 or less, you may exile it and attach it to this card. If this card is put into a graveyard, you may cast the attached spells as though they had flash. Exile those spells.)
Seijin of the Awakened Souls gets +1/+1 for each spell you own in exile that is attached
to a creature with holy.