msem-instigator

Enspirit (As you cast this spell, you may exile a nonenchantment creature you control until this leaves the battlefield or fails to resolve. Reduce this spell's cost by the exiled card's mana value.)
When Shaman of the First Pact enters the battlefield, exile up to four target creature cards from graveyards. You may cast them for as long as they remain exiled and you may spend mana as though it were mana of any type to cast them.