In this set, [someone asked,] Hey, can you remove I dont know why its even there killing an undead thing on your Phoenix Down?' Verhey said
Archangel of Thune is among the strongest, turning each instance of lifegain into a buff for your entire team
We already had the much maligned board wipe of Be Prepared, the classic Dragon Fire for targeted removal and recently Lady Tremaine has been forcing players to banish one of their own characters when she enters play, even getting around ward effects
Glare of Subdual will do the trick, and Opposition clearly has the most utility out of the three, but my sleeper pick would have to be for Diversionary Tactics - particularly the foil treatment
Hence why Rydias called Summoner of Mist. In Final Fantasy 6 , Terra is half-Esper (the games unique term for a race of summons that have their own plane and culture), so her dual nature quite literally makes her a Magical Adept capable of transforming into an Esper herself and copying a summon on the board