
Nonartifact spells you cast have improvise. (Your artifacts can help cast those spells. Each artifact you tap after you're done activating mana abilities pays for .)
"In the early days, Urza's wondrous automatons were seen as symbols of hope and courage." —*The Antiquities War*
Illustrated by Kirsten Zirngibl · The Brothers' War Retro Artifacts · #85z
2017-02-09
Multiple instances of improvise are redundant.
2017-02-09
If you cast a nonartifact spell that requires you to sacrifice a permanent as an additional cost, you may tap that permanent (if it's an artifact) for the spell's improvise ability before you sacrifice it to pay that cost.