Tatarski, Druid of the Fallen

{b}{g}, {t}: Exile a creature from your graveyard
and put a fallen counter on target land you
control. That land becomes a copy of the exiled
creature for as long as it has a fallen counter on
it, and also gains decayed. It's still a land.
Remove a fallen counter from a land you control:
It gains "{t}: Add {b}{g} to your mana pool." until
end of turn. Activate this ability only any time
you could cast a sorcery.