Igor, Iron Man Suit

Bestow {2}{b} (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.)
Igor, Iron Man Suit can't attack alone.
Enchanted creature gets +2/+2 and has trample.
If enchanted creature would be destroyed, you
may remove all damage from it and destroy Igor,
Iron Man Suit instead.