Eidolon of Countless Battles (Secrets of Strixhaven Commander)

Enchantment Creature Ñ Spirit - 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.)
This creature and enchanted creature each get +1/+1 for each creature you control and +1/+1 for each Aura you control.