Ghostblade Eidolon

Ghostblade Eidolon

Enchantment Creature - Spirit | Power/Toughness: 1 / 1 (CMC 3)
Bestow (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.)
Double strike (This creature deals both first-strike and regular combat damage.)
Enchanted creature gets +1/+1 and has double strike.