You know how Feather players turn random Limited-only combat tricks into a cacophony of effects to end Commander games with? What would happen if the combat trick is a keyword soup monstrosity all by itself?
Hahahahahaha! Yeah, that's going straight into Feather. It's more than 1 mana and it's a sorcery, sure, but this lends inevitability to your win. It grows Feather. Vigilance so you can both attack and block. Trample so you get through. Lifelink so you survive longer. Indestructible to keep her alive. And haste in case she dies. Just make sure you have another defensive spell to cast while this is on the stack