Demethiel Arcane Arborist

When Demethiel Arcane Arborist enters the battlefield, search your library for X basic lands where X is the amount of green mana used to cast this spell. Put up to one onto the battlefield tapped
and the rest into your hand.

When a land enters the battlefield under your control, create a 3/3 golem token. When you discard a land, you may cast target spell in your graveyard until end of turn. If you cast a spell this way, exile it instead.