Retract

Less a spell than a reset button for cards that pay you to play them. When every artifact you control bounces home at once, the cost-reducing artifact lands and zero-cost trinkets that fueled an affinity-style engine all recur their enters-the-battlefield value, and any artifact that draws or pings on cast can be replayed for full effect on the same turn. The one-mana price and instant speed are doing the heavy lifting: the spell is cheap enough to chain into the very resources it returns, and the timing lets it slip in as a response, dodging a sorcery-speed sweeper by picking your board up before it can be destroyed. The catch is the word "all," which is the discipline keeping a near-free combo enabler in check: you cannot cherry-pick which permanents survive, so the same effect that rescues your engine also strands your mana rocks and abandons your defenses. That total return is the line between asset and accident. It asks for a deck where re-casting the board is profit rather than penance, and outside that structure it is a one-mana way to undo your own afternoon's work.