Colossodon Yearling [Dragons of Tarkir] SPA Hidra del Apocalipsis Set: Rise of the Eldrazi

Set: Rise of the Eldrazi Type: Sorcery Common Cost: {1}{B} All creatures get -1/-1 until end of turn

When Knowledge Vault leaves the battlefield

Set: Shards of Alara Type: Instant Common Cost: {2}{U} Return target permanent to its owner's hand

Set: Planechase Planes Type: Plane — Mercadia Common Cost: When you planeswalk to Cliffside Market or at the beginning of your upkeep

Unfortunately for them

Colossodon Yearling [Dragons of Tarkir] SPA Hidra del Apocalipsis Set: Rise of the EldraziSet: Dragons of Tarkir Type: Creature Beast Common Cost: {2}{G} The colossodon's hard outer shell stops many predators, but with a gentle flip from a dragon, it quickly becomes a meal in a bowl.