Merchant's Dockhand [Aether Revolt Prerelease Promos] Merfolk Noble and more take on new

and more take on new forms in service of a new form of Gaia the Dragon Champion that stacks an extra 2600 ATK on to itself every time it wins a battle and can expend exactly that much ATK to destroy any card on the field without a fight

Shatterskull Pass is a pretty distant second

Set: Commander 2011 Type: Enchantment Rarity: Rare Cost: {1}{B}{B} {B}

Set: Promo Finish: Rainbow Foil Type: Action Subtype: Attack Rarity: Promo Class: Ninja Cost: 0 Power: 2 Combo - If Surging Strike was the last attack this combat chain

Set: Diamond & Pearl: Legends Awakened Type: Fighting Rarity: Holo Rare Retreat cost: Colorless

Merchant's Dockhand [Aether Revolt Prerelease Promos] Merfolk Noble and more take on newSet: Aether Revolt Prerelease Promos Type: Artifact Creature Construct Rarity: Rare Cost: {1} {3}{U}, {T}, Tap X untapped artifacts you control: Look at the top X cards of your library. Put one of them into your hand and the rest on the bottom of your library in any order. "If you can build it, we can move it." Bes Tavani, Bomat merchant