The Alien's Amulet Device

This amulet device came from the remains of the Alien, collected by Cassius not long after he brought about the END of the Oblivion's Threshold Gate. During the time before everything ended, he also just barely managed to teleport everyone out and absorb part of the Gremlin Extraterrestrial Fiend's memories. He couldn't get all of its memories, and there was likely no way he could have. If not for his quick thinking and acting, the Alien would've certainly escaped, and everything would've been for nothing. Instead of getting partial memories, he would have gotten no memories.