Grefnac, Rebel Historian

Historic spells you control cost {1} less to cast,
and you may cast them at instant speed as long
as Grefnac is untapped. Whenever you cast a
historic spell put a +1/+1 on Grefnac.
He wanders the corrupted plane of New Phyrexia
hoping to compile the complete story of the Mirrodin
of his youth before he succumbs to compleation.