Wipe Away

What the extra mana buys is unconditionality. A spell that returns any permanent to hand is filler at common rates; the reason this one matters is split second, which slams the stack shut the instant it goes on. No sacrificing the target in response, no flashing in a replacement, no fetch, no sidestep beyond mana abilities and triggered abilities themselves. The clause converts a soft tempo play into a hard answer: against a permanent that would otherwise wriggle away when targeted (a creature with a sacrifice outlet, a threat shielded by a stack-based protection effect, a planeswalker poised to ultimate), the only out is to have already acted before this resolves. Split second is one of the rarest keywords ever printed, and it exists for exactly this purpose: a removal-shaped effect that cannot be answered by cast spells or activated abilities on the stack, trading freedom of timing for certainty of outcome. The price of that certainty is real. Three mana returns a permanent rather than destroying it, so the owner gets the card back and you have bought a single turn. But against a board where one turn decides the game, or against an engine whose only defense lives on the stack, buying that turn with zero risk of a cast-spell response is a guarantee no counterspell or instant-speed kill can match. It is not flexible removal; it is a window that no one else gets to use.