Reverse Engineer

All 5 printings of Reverse Engineer

Printing	Rarity	Non-foil	Foil	Cardmarket (EUR)	My collection
Commander Masters cmm #116· 2023common· Cardmarket €0.07 · €0.17 foil	common	$0.18	$0.30	€0.07€0.17 foil	+ Add, Reverse Engineer, Commander Masters #116
March of the Machine Commander moc #232· 2023uncommon· Cardmarket €0.13	uncommon	$0.36	—No foil printing	€0.13	+ Add, Reverse Engineer, March of the Machine Commander #232
Commander 2018 c18 #99· 2018uncommon· Cardmarket €0.22	uncommon	$0.20	—No foil printing	€0.22	+ Add, Reverse Engineer, Commander 2018 #99
Aether Revolt aer #42· 2017uncommon· Cardmarket €0.20 · €0.61 foil	uncommon	$0.19	$0.47	€0.20€0.61 foil	+ Add, Reverse Engineer, Aether Revolt #42
Friday Night Magic 2017 f17 #7· 2017Promorare· Cardmarket €0.22 foil	rare	—No non-foil printing	$0.41	€0.22 foil	+ Add, Reverse Engineer, Friday Night Magic 2017 #7

Prices are TCGplayer market prices in USD for each printing and finish, via Scryfall. They are a guide, not an appraisal.

Rulings (8)

1. 2018-07-13

   Improvise doesn't change a spell's mana cost or mana value.

2. 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.

3. 2018-07-13

   Improvise can't pay for , , , , , or mana symbols in a spell's total cost.

4. 2018-07-13

   Tapping an artifact won't cause its abilities to stop applying unless those abilities say so.

5. 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.

6. 2018-07-13

   If an artifact you control has a mana ability with 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.

7. 2018-07-13

   When using improvise to cast a spell with 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 . If you tap two artifacts, you'll have to pay .

8. 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 .”