Marsh Flats [Modern Masters 2017] noPrice Set: Unstable Type: Host Creature

Set: Unstable Type: Host Creature — Cat Rarity: Common Cost: {W} When this creature enters the battlefield

Set: Amonkhet Prerelease Promos Type: Land — Forest Plains Rarity: Rare ({T}: Add {G} or {W}

Set: Commander Anthology Volume II Type: Creature — Hag Rarity: Common Cost: {2}{B/G}{B/G} When Desecrator Hag enters the battlefield

Set: Magic 2015 Type: Creature — Plant Hydra Rarity: Rare Cost: {X}{G}{G} When you cast this spell

That was his first mistake

Marsh Flats [Modern Masters 2017] noPrice Set: Unstable Type: Host CreatureSet: Modern Masters 2017 Type: Land Rarity: Rare {T}, Pay 1 life, Sacrifice Marsh Flats: Search your library for a Plains or Swamp card, put it onto the battlefield, then shuffle.