Whir of Invention [Aether Revolt Prerelease Promos] Elf Shaman draw a card

draw a card

they're treated as though they don't exist

Set: New Phyrexia Type: Artifact Rarity: Rare Cost: {4} Untap all artifacts you control during each other player's untap step

put that many +1/+1 counters on Tetravus

Remove a +1/+1 counter from Phantom Nishoba

Whir of Invention [Aether Revolt Prerelease Promos] Elf Shaman draw a cardSet: 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.