Blackwing - Kris the Crack of Dawn
If you control a "Blackwing" monster other than "Blackwing - Kris the Crack of Dawn", you can Special Summon this card (from your hand). You can only Special Summon "Blackwing - Kris the Crack of Dawn" once per turn this way. Once per turn, this card cannot be destroyed by Spell/Trap effects.