Goryo's Vengeance [Betrayers of Kamigawa] BT8-137 providing Ravnica with the vast

providing Ravnica with the vast majority of its food production

where X is the number of Swamps you control

• 2 Rally the Rearguard (3)

You may spend blue mana as though it were mana of any color to pay the activation costs of Quicksilver Elemental's abilities

and up to one without

Goryo's Vengeance [Betrayers of Kamigawa] BT8-137 providing Ravnica with the vastSet: Betrayers of Kamigawa Type: Instant Arcane Rarity: Rare Cost: {1}{B} Return target legendary creature card from your graveyard to the battlefield. That creature gains haste. Exile it at the beginning of the next end step. Splice onto Arcane {2}{B} (As you cast an Arcane spell, you may reveal this card from your hand and pay its splice cost. If you do, add this card's effects to that spell.)