Whir of Invention [Aether Revolt Prerelease Promos]

Whir of Invention [Aether Revolt Prerelease Promos]Set: Aether Revolt Prerelease Promos 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.

guard your horses carefully

Set: Fifth Edition Type: Artifact Rarity: Rare Cost: {3} {3}

Set: Duel Decks Anthology Tokens Type: Token Creature — Spirit Rarity: Common Flying

Set: Alara Reborn Type: Creature — Human Knight Rarity: Rare Cost: {2}{G}{W} Each other multicolored creature you control gets +1/+1 for each of its colors

you may return target Spirit card with mana value 2 or less from your graveyard to your hand

Scattered Groves enters the battlefield tapped

Sylvan Advocate and land creatures you control get +2/+2

It's an unfortunate side effect

Whenever a player draws a nonland card

Set: Planechase Planes Type: Plane — Shandalar Rarity: Common Whenever a player taps a permanent for mana

"If it is weak

Set: Commander 2011 Type: Legendary Creature — Human Cleric Rarity: Mythic Cost: {1}{R}{W}{B} Flying