Zefey, Senate's Champion

Partner with Allaya, Light of Azor
Zefey, Senate's Champion gets +2/+2 for each
Aura that is attached to it.
Whenever Zefey attacks or blocks, you may cast
an Aura spell you own that is exiled with a light
counter on it. If you do, that spell's mana cost is
reduced by {x}, where X is the number of times
Zefey has been cast from the command zone.