Astor Kremly, the Second Seer
From Wyvern Source
Warning; Astor Kremly is a quest related NPC that at time of writing (9/8/2022) is not fully implemented. He can be killed for his guild badge and lore continuation, but he hits very hard and should only be assaulted with caution. His HP pool is significantly higher than any other Threat Level 25 enemy, and he is able to defeat multiple summoned archangels before death.