As a sorcery, you may pay the mana cost of a locked door to unlock it.) When you unlock this door, manifest dread
However, its potential for explosive plays and synergy with the right build could make it a viable inclusion in certain decks
This build weaponizes targeted discard and hand disruption to strip your opponents' answers, then closes the game out with Thoracle, Breach, or Ad Nauseum
Whenever you cast a noncreature spell, prowess will automatically give your creature +1/+1
That wont matter often, but it does mean you always get the maximum amount of reduction from your effects, regardless of taxation effects on board
Given the advantage of using improvise to pay for X like with Whir of Invention, this card can quickly end games where you have plenty of extra artifacts