This glitch is performed with either Kratos or Zelos. Equip the EX-Skill Super Chain(lvl 3 EX-Gem) and enter a battle. Use Guardian and link it to any spell except Judgment. The effect of Guardian will remain until you cast it(you will also not be able to be interrupted, even if you do not have Concentrate). If you charge the spell using the EX-Skill Spell Charge(lvl 4 EX-Gem), the effect will last until the charged spell is cast. The effect will also go away if you cast another spell while the other spell is still charged.
Submitted by: Matt