Sorry for the spoilers, I really can't figure out how to spoiler-tag my text.
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Actually, you can stun Gyorg with the barrier. He's invincible for a second or so after taking damage, but as long as you stick to him he'll be thrown for a loop (litterally).
Also, have you tried re-entering the Temples after beating them? It's pretty important if you want to complete the game's sidequests... Just a hint.







