Jungle Basin enters the battlefield tapped. When Jungle Basin enters the battlefield, sacrifice it unless you return an untapped Forest you control to its owner's hand. {T}: Add {C}{G}.
Karoo enters the battlefield tapped. When Karoo enters the battlefield, sacrifice it unless you return an untapped Plains you control to its owner's hand. {T}: Add {C}{W}.
Oran-Rief, the Vastwood enters the battlefield tapped. {T}: Add {G}. {T}: Put a +1/+1 counter on each green creature that entered the battlefield this turn.
Once guarded by the Knights of the Reliquary, the tower stands now protected only by its own remoteness, its dusty treasures open to plunder by anyone.