Reverse Engineer

Public decks that run Reverse Engineer

• Exquisite Invention - Commander 2018, led by Saheeli, the Gifted
• Tinker Time - March of the Machine Commander, led by Gimbal, Gremlin Prodigy

Commanders that run Reverse Engineer most

Deck counts from EDHREC.

• Gimbal, Gremlin Prodigy: 1,246 decks
• Rashmi and Ragavan: 962 decks
• Sai, Master Thopterist: 583 decks
• Saheeli, the Gifted: 543 decks
• Myra the Magnificent: 506 decks
• Lonis, Cryptozoologist: 429 decks
• Brudiclad, Telchor Engineer: 370 decks
• Jhoira, Ageless Innovator: 247 decks

Often played with Reverse Engineer

Cards that show up in the same decks on EDHREC.

• Sandsteppe War Riders
• Crack Open
• Root Out
• Black Hole
• Line Cutter
• Aid from the Cowl
• Deadbeat Attendant
• Discourtesy Clerk
• Step Right Up
• Weirding Wood

Rulings

• 2018-07-13: Improvise doesn't change a spell's mana cost or mana value.
• 2018-07-13: 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.
• 2018-07-13: Improvise can't pay for {W}, {U}, {B}, {R}, {G}, or {C} mana symbols in a spell's total cost.
• 2018-07-13: Tapping an artifact won't cause its abilities to stop applying unless those abilities say so.
• 2018-07-13: 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.
• 2018-07-13: 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.
• 2018-07-13: 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 Saheeli's Directive and choose X to be 3, the total cost is {3}{R}{R}{R}. If you tap two artifacts, you'll have to pay {1}{R}{R}{R}.
• 2018-07-13: 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}.”