Crypt Surge

Rune (When you cast this card, you may exile it.
For as long as it remains exiled, you may cast a copy
of it once each turn without paying its mana cost.)
Enchant creature
Enchanted creature gets +1/+0.
If Crypt Surge isn't a token, enchanted creature
has "{b}, Sacrifice an Aura: Enchanted creature
gains indestructible until end of turn."