Queen Glacier

Flying, Freezing (When this attacks a creature, have it tapped, you can choose to attack this creature, if you do, destroy it)
When Queen Glacier enters the battlefield, all Icewings gain +3/+3, if it's a Royal Icewing it gets +4/+4
{w/u}:If you played this for it's blue cost, make a 4/3 Icewing Royal Hunter, if you played it for it's white cost, make a Royal Icewing