Whir of Invention [Aether Revolt Prerelease Promos] Forbidden Legacy Increase the ATK of this

Increase the ATK of this card by 300 points for each card in your Graveyard that includes 'Elemental Hero' in its card name

When this card is destroyed by your opponent's card effect: Target 1 "Six Samurai" monster in your Graveyard

eyes gleaming with unspoken promises

" —Maimun al-Wyluli

Whir of Invention [Aether Revolt Prerelease Promos] Forbidden Legacy Increase the ATK of thisSet: 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.