Arc Blade
Suspend's most quietly clever trick was using the time counters for two jobs at once: as the delayed timer that earns the discount, and as a reusable resource the spell spends on itself. Pay the suspend cost and it exiles with three time counters, ticking down to a free cast on the third upkeep. But that cast re-exiles it with three fresh counters, so the same two damage comes back every third turn, indefinitely, off a single up-front investment. It is a burn engine disguised as a one-shot, the kind of recursion red almost never gets to keep. The trade is plain in the structure: each shot costs three full turns of waiting, and the only window for interaction is the brief moment the spell sits on the stack waiting to resolve, since once it resolves its own effect tucks it back into exile under fresh counters. Cast from hand for the full mana value, it is overpriced for two damage; that's the point. The loop is the only sensible way to play it, and the rate only adds up once you accept the patience tax. It belongs to the small family of suspend spells designed around the loop rather than the discount, where the reward for a slow plan is a resource that never runs out, only slows down.

