Artifact Creature â Assembly-Worker
Improvise (Your artifacts can help cast this spell. Each artifact you tap after you're done activating mana abilities pays for .)3/3
When calculating a spellâ€™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.
Tapping an artifact wonâ€™t cause its abilities to stop applying unless those abilities say so.
Improvise doesnâ€™t change a spellâ€™s mana cost or converted mana cost.
Improvise canâ€™t pay for , , , , , or mana symbols in a spellâ€™s total cost.
Improvise canâ€™t be used to pay for anything other than the cost of casting the spell. For example, it canâ€™t be used during the resolution of an ability that says â€œCounter target spell unless its controller pays .â€
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 spellâ€™s costs. You wonâ€™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 wonâ€™t be on the battlefield when you pay the spellâ€™s costs, so you wonâ€™t be able to tap it for improvise.
Equipment attached to a creature doesnâ€™t become tapped when that creature becomes tapped, and tapping that Equipment doesnâ€™t cause the creature to become tapped.
Because improvise isnâ€™t an alternative cost, it can be used in conjunction with alternative costs.