I THINK THAT GROGAR WAS A SHADOW IN SEASON 4 EP.3 ,BECAUSE TIREK DIDNT KNOW ABOUT TWILIGHT PRINCESS AT THAT MOMENT, PONY OF SHADOW HAS WHITE EYES. SO THIS COULD BE ONLY GROGAR. HE MAYBE WAS SPYING FOR MANE SIX FROM SEASON 4 ( BUT I AM NOT SURE)
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