Dewgong (24/147) [Platinum: Supreme Victors] Swamp Mountain and both become as one

and both become as one

Set: Commander 2017 Oversized Type: Legendary Creature — Dragon Avatar Rarity: Mythic Cost: {4}{W}{U}{B}{R}{G} Eminence — As long as The Ur-Dragon is in the command zone or on the battlefield

Set: Gateway 2008 Type: Creature — Dwarf Shaman Rarity: Rare Cost: {2}{R/W} When Duergar Hedge-Mage enters the battlefield

Set: Beta Edition Type: Creature — Djinn Rarity: Rare Cost: {4}{U}{U} Flying (This creature can't be blocked except by creatures with flying or reach

Set: Battle for Zendikar Prerelease Promos Type: Legendary Planeswalker — Kiora Rarity: Mythic Cost: {2}{G}{U} +1: Untap up to one target creature and up to one target land

Dewgong (24/147) [Platinum: Supreme Victors] Swamp Mountain and both become as oneSet: Platinum: Supreme Victors Type: Water Rarity: Rare Retreat cost: Colorless,Colorless,Colorless