Whir of Invention

Public decks that run Whir of Invention

• Heads I Win, Tails You Lose - Secret Lair Drop, led by Zndrsplt, Eye of Wisdom

Commanders that run Whir of Invention most

Deck counts from EDHREC.

• Urza, Lord High Artificer: 11,528 decks
• Kinnan, Bonder Prodigy: 5,621 decks
• Breya, Etherium Shaper: 5,389 decks
• Tivit, Seller of Secrets: 3,964 decks
• Emry, Lurker of the Loch: 3,237 decks
• Okaun, Eye of Chaos // Zndrsplt, Eye of Wisdom: 2,916 decks
• Urza, Chief Artificer: 2,329 decks
• Urza, Lord Protector: 2,004 decks

Often played with Whir of Invention

Cards that show up in the same decks on EDHREC.

• Grasping Scoundrel
• Reshape
• Battered Golem
• Power Artifact
• Transmute Artifact
• Artificer's Intuition
• Saheeli's Directive
• Kurkesh, Onakke Ancient
• Thopter Foundry
• Goblin Engineer

Rulings

• 2017-02-09: Because improvise isn't an alternative cost, it can be used in conjunction with alternative costs.
• 2017-02-09: If an artifact you control has a mana ability with {T} in the cost, activating that ability while casting a spell with improvise will result in the artifact being tapped when you pay the spell's costs. You won't be able to tap it again for improvise. Similarly, if you sacrifice an artifact to activate a mana ability while casting a spell with improvise, that artifact won't be on the battlefield when you pay the spell's costs, so you won't be able to tap it for improvise.
• 2017-02-09: Tapping an artifact won't cause its abilities to stop applying unless those abilities say so.
• 2017-02-09: Improvise can't be used to pay for anything other than the cost of casting the spell. For example, it can't be used during the resolution of an ability that says "Counter target spell unless its controller pays {3}."
• 2017-02-09: Improvise can't pay for {W}, {U}, {B}, {R}, {G}, or {C} mana symbols in a spell's total cost.
• 2017-02-09: When calculating a spell's total cost, include any alternative costs, additional costs, or anything else that increases or reduces the cost to cast the spell. Improvise applies after the total cost is calculated.
• 2017-02-09: Equipment attached to a creature doesn't become tapped when that creature becomes tapped, and tapping that Equipment doesn't cause the creature to become tapped.
• 2017-02-09: When using improvise to cast a spell with {X} in its mana cost, first choose the value for X. That choice, plus any cost increases or decreases, will determine the spell's total cost. Then you can tap artifacts you control to help pay that cost. For example, if you cast Whir of Invention (a spell with improvise and mana cost {X}{U}{U}{U}) and choose X to be 3, the total cost is {3}{U}{U}{U}. If you tap two artifacts, you'll have to pay {1}{U}{U}{U}.
• 2017-02-09: Improvise doesn't change a spell's mana cost or mana value.