Blue Steel, Iron Man Suit

Bestow {3}{u} (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.)
Flying, double strike
Enchanted creature gets +1/+1 and has flying
and prowess. If enchanted creature would be destroyed, you may remove all damage from it
and destroy Blue Steel, Iron Man Suit instead.