According to your picture, the member of Instinct who stepped out was wearing Boots of Lightness and an Amulet of Glory. I looked through the video I took myself (of the entire war) and only one Instinct member was wearing Boots of Lightness. He was also wearing an Amulet of Glory. So, to clear this all up... it was Dark Vthesh2. Though, it could have been a simple mistake, as I'm sure it was. Either way, 1 person would hardly have that much effect - and we won with 7 people left. Such a simple thing surely cannot create an auto win when we clearly won...