Maggoty Scrimm, Muckraker

At the beginning of your upkeep, you may put
a basic land from your graveyard onto the
battlefield tapped.

Whenever you discard a land, add {u} or {b}.

{2}{u}{b}, Exile X lands from your graveyard: Put a
creature with mana value X from a graveyard onto
the battlefield under your control.