Izzet Boilerworks [Guildpact] Pro Tour Promos You may spend mana as

You may spend mana as though it were mana of any type to cast creature spells

Set: Zendikar Type: Legendary Planeswalker — Nissa Rarity: Mythic Cost: {2}{G}{G} +1: Search your library for a card named Nissa's Chosen and put it onto the battlefield

Set: Hour of Devastation Prerelease Promos Type: Creature — Naga Wizard Rarity: Rare Cost: {2}{U} When Champion of Wits enters the battlefield

Set: Champions of Kamigawa Type: Artifact Rarity: Uncommon Cost: {1} {1}: Look at the top three cards of your library

Izzet Boilerworks [Guildpact] Pro Tour Promos You may spend mana asSet: Guildpact Type: Land Rarity: Common Izzet Boilerworks enters the battlefield tapped. When Izzet Boilerworks enters the battlefield, return a land you control to its owner's hand. {T}: Add {U}{R}.