Gyergya the Zapper

Haste, Prowess, Lifelink
Whenever you attack with three or more creatures, you may pay {r}{r}. If you do, return Gyergya the Zapper from your graveyard to your hand.
Channel - {r}, Discard Gyergya the Zapper: Deal 3 damage to any target.
Could you watch this power line for me? I have to visit my girlfriend in Canada, BRB.