Silence the Believers

Black almost never gets to exile, and it almost never gets to clear two creatures with one spell without the answer dying alongside the threats. This does both, and strive is the toll the color pays to break those two restrictions at once. At a single target it functions as clean four-mana removal that exiles rather than destroys, stepping over indestructibility, recursion, and the death triggers that a graveyard-centric color tends to leave on the table. The "all Auras attached to them" clause is collateral, not targeting: you point the spell at the creature, and whatever it is wearing leaves with it, so an enchanted attacker comes off the board with its support intact rather than slipping a buff onto something else. The scaling is what stops this from strictly upgrading every black single-target answer: each additional target costs a full more, so a second creature runs seven total and a third runs ten. That curve stays honest at one target and becomes a real investment at two, which is the correct shape for an effect that exiles. Instant speed matters more than the rate suggests, since holding it open lets you defer the strive count until after blockers or after a creature redeploys, paying for extra targets against full information instead of committing early. Where much flexible removal of its era scaled on extra cards or extra colors, tying the scaling to raw mana, in mono-black, is the cleaner statement of what the color will spend for permanent answers.