Crop Rotation

As an additional cost to cast this spell, sacrifice a land.
Search your library for a land card, put that card onto the battlefield, then shuffle.

Sylvan Scrying

Search your library for a land card, reveal it, put it into your hand, then shuffle.

Each land is a Swamp in addition to its other land types.

Search your library for a card, put that card into your graveyard, then shuffle.

{2}, {T}: Add {B} for each Swamp you control.