Reflect Damage

Built as a replacement effect: when a source would deal damage this turn, that damage is instead redirected to that source's controller. Notice the wording: you name "a source of your choice," not a target. That distinction matters, because it means the spell does not interact with shroud, hexproof, or ward at all. You can point it at an untargetable attacker, a hexproof creature's pinging ability, or any burst of damage an opponent thought was protected, and reroute the next packet that source would deal back onto its own controller. That makes it punisher insurance against any concentrated burst: a giant attacker, a large direct-damage spell, or an ability that pings for a lot at once becomes self-inflicted loss. What disciplines the effect is "the next time" and "this turn": one redirection, one window, so you have to read the turn correctly and point it at the packet that matters rather than waste it on a chip of combat damage. At five mana for an instant that touches a single damage event, the rate asks you to set it up as ambush insurance against a known haymaker, not a generic answer. The "redirect a source's damage back to its controller" pattern was a core white-red design axis in the game's first years, the kind of effect later rules revisions made harder to template cleanly; the modern game mostly retired it, leaving this as a record of how flexibly damage could be rerouted before the math got formalized.