Sadako, Vengeful Ghost

Bestow{2}{w}{w} (If you cast this card for its bestow cost, it's an Aura spell with enchant creature.
It becomes a creature again if it's not attached
to a creature.)
Eidolon of Countless Battles and enchanted creature each get +1/+1 for each creature you control and +1/+1 for each Aura you control.