Spell Queller

A hard counter says no and leaves nothing behind. This says no on a delay and leaves a 2/3 flier behind to do something about the table while it stalls. The exile clause is the whole tension: the spell is not destroyed, only held in escrow, returned to its owner to cast for free the moment this Spirit dies or gets bounced. That converts every removal spell aimed at it into a tempo calculation, because killing the body hands back the answer you spent it on. The mana value 4 or less restriction is the meaningful ceiling. It catches the early and mid-game spells that decide tempo races, not the top-end haymakers a control deck most needs to fight, so it functions as an interceptor of curves rather than a true counterspell. What it actually buys is time, and a clock to spend that time on: flash it in to deflect a spell, present a flier, and force the opponent to commit a second card just to reclaim the first. It belongs to a school of blue-white design that prizes proactive interaction, pieces that interfere with the opponent while still advancing your own board rather than spells that do nothing but answer. Among the soft counters stapled to creatures, this is the one that stuck, precisely because the body and the deferred-spell tension let it be a clock and a denial in the same card.