Whir of Invention [Aether Revolt] Battle for Zendikar Prerelease Promos in this time of rebirth

in this time of rebirth

tap Yawgmoth Demon and it deals 2 damage to you

Set: Beta Edition Type: Artifact Rarity: Rare Cost: {4} {2}

then shuffle your library

Set: Portal Three Kingdoms Type: Legendary Creature — Human Soldier Warrior Rarity: Rare Cost: {4}{G} Horsemanship (This creature can't be blocked except by creatures with horsemanship

Whir of Invention [Aether Revolt] Battle for Zendikar Prerelease Promos in this time of rebirthSet: Aether Revolt Type: Instant Rarity: Rare Cost: {X}{U}{U}{U} Improvise (Your artifacts can help cast this spell. Each artifact you tap after you're done activating mana abilities pays for {1}.) Search your library for an artifact card with mana value X or less, put it onto the battlefield, then shuffle.