Whir of Invention [Aether Revolt Prerelease Promos] Homunculus {T}: Exchange target opponent's life

{T}: Exchange target opponent's life total with Tree of Perdition's toughness

and then you're done

you may exile Kozilek's Return from your graveyard

Discard this card: Search your library for a Plains card

Set: Revised Edition Type: Enchantment Rarity: Rare Cost: {1}{U} You may have Copy Artifact enter the battlefield as a copy of any artifact on the battlefield

Whir of Invention [Aether Revolt Prerelease Promos] Homunculus {T}: Exchange target opponent's lifeSet: 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.