Reprieve

Below Mystical Dispute (63) as it only delays spells, but cantripping stack interaction and protection can support 1-2 copies in white control.

Could be wrong if Two mana for a temporary answer may be too slow when opponents can immediately recast key spells.

Less efficient than Consign to Memory (72), but returning rather than countering gives occasional unique utility against protected spells in UWx lists.

Could be wrong if Legacy's cheap permanent counters may leave little room for a two-mana temporary answer.

It can interrupt a pivotal spell while replacing itself, but only postponing the spell makes it a selective interactive inclusion rather than premium removal.

Could be wrong if Multiplayer opponents can often simply recast the returned spell before it meaningfully changes the game.

A cantripping one-turn delay can gain tempo or punish tricks, but it is poor when opponents can readily recast their spell.

Could be wrong if Unknown speed, creature curve, and removal density determine whether the tempo exchange is worthwhile.