History
Seidring the Merciless was the highest-ranked of Odin's council. When Thor revealed his secret identity to Jane Foster, Odin did not have the heart to punish Thor himself, so he transferred his power to Seidring. Seidring was overcome with lust at the power given to him and instead of returning the power to Odin, turned against the Asgadian All-Father and declared himself new master over Asgard. He was defeated by Thor who threatened to use the Odinsword, preferring to destroy all Asgardians rather than having them under the rule of an usurper.[1]