Kozilek, the Great Distortion [Oath of the Gatewatch Prerelease Promos] Praetor {T}: Target land becomes a

{T}: Target land becomes a Forest until Gaea's Liege leaves the battlefield

But where is the source

Set: Eternal Masters Type: Legendary Land Rarity: Mythic {T}: Add {W}

Sacrifice Marsh Flats: Search your library for a Plains or Swamp card

Set: Modern Masters 2017 Type: Land Rarity: Mythic As Cavern of Souls enters the battlefield

Kozilek, the Great Distortion [Oath of the Gatewatch Prerelease Promos] Praetor {T}: Target land becomes aSet: Oath of the Gatewatch Prerelease Promos Type: Legendary Creature Eldrazi Rarity: Mythic Cost: {8}{C}{C} When you cast this spell, if you have fewer than seven cards in hand, draw cards equal to the difference. Menace Discard a card with converted mana cost X: Counter target spell with converted mana cost X. A void as cryptic as reality itself.