Elder scroll

Dragon's cost {1} less to cast from your hand.
Dragons in all graveyards have unerath {3} and are
1/1. Activate only as a sorcery. Dragons with the
Elder counter have ward {2} and pay {r} get+1+0
Alduin The World Eater has Indestructible as
long as The Elder Scroll is on the field.
As long as Alduin is on the field your dragons
cannot be exiled from your graveyard.