Mutavault [Magic 2014] Merfolk Set: Magic 2010 Type: Artifact

Set: Magic 2010 Type: Artifact Rarity: Rare Cost: {5} Each creature gets +1/+1 for each other creature on the battlefield that shares at least one creature type with it

then Combustible Gearhulk deals damage to that player equal to the total mana value of those cards

Goblins Type: Land Rarity: Uncommon {T}: Add {C}

He wished for growth

each opponent loses 1 life and you gain that much life

Mutavault [Magic 2014] Merfolk Set: Magic 2010 Type: ArtifactSet: Magic 2014 Type: Land Rarity: Rare {T}: Add {C}. {1}: Mutavault becomes a 2 2 creature with all creature types until end of turn. It's still a land. Some worlds possess a hidden core where life's essence constantly surges.