Kit Walker posted:

Saga Frontier has a magic system where there are several opposing schools of magic and if you choose to align yourself with one of them, you can't learn any of the spells from its rival. Stuff like Light/Dark, Rune/Arcane, Time/Space. One of the protagonists, Blue, is an exception to this rule, as he's a crazy overpowered wizard and an event near the end of his storyline has him acquire every spell from every school he wasn't aligned with. This grants him a specific combination of spells that nearly no other character can match: OverDrive, Shadow Servant, Tower, and Stasis Rune. Tower and Stasis Rune are from opposing schools and that's what limits this to Blue and one other character.

Okay, so here's how it works.
1. Cast OverDrive. This spell uses up all your mana, but gives you seven turns in a row. Mana isn't deducted until the end of your turns, so you can still cast magic.
2. Cast Shadow Servant. This spell creates a duplicate of you that will copy all your attacks.
3. Cast Tower five times. This spell essentially converts all your MP into pure damage. Normally you can only cast it once since you'd run out of mana, but here you can cast it five times in a row safely because the cost isn't deducted until the end of your turns. Your clone will also copy these attacks for more massive damage.
4. On your last turn, cast Stasis Rune. This spell puts both you and the enemy you targeted into stasis. Neither of you can attack, and neither of you can be damaged. Essentially it takes you both out of the fight. It lasts several turns and works on any enemy, including bosses. It also for whatever reason prevents the cost of all the spells you cast earlier from being deducted.

Essentially, you can get seven free turns to perform ten incredibly powerful attacks at no cost to yourself whatsoever. Stasis Rune wears off for both you and the enemy at the same time and you get your turn first which means you can repeat this cycle over and over without any risk of reprisal until your opponent is dead. It's definitely a glitch but it works within Blue's narrative since he's unique among magic users and supposed to be something that has never been seen before. If you're basically the god of magic at that point, why not break the whole system over your knee?