If this card is in your Graveyard: You can return 1 face-up card you control to the hand; Special Summon this card, and if you do, take 400 damage. You can only use this effect of "Blackwing - Zephyros the Elite" once per Duel.
Returning a monster to your hand can let you reuse the effects of monsters that activate upon summoning.
Returning a monster the hand to remove any negative effects attached to that monster.
Many Blackwing monsters can be Special Summoned when you control a Blackwing monster. This lets you Special Summon back the Blackwing monster you bounced when summoning Zephyros. Special Summon a Blackwing Tuner to make a Synchro play.