Infinity Watch
When Adam Warlock obtains possession of the all-powerful Infinity Gauntlet (that contained the six Infinity Gems) from Thanos, he is ordered by the Living Tribunal to separate the Gems so that they might never be used in conjunction again. Warlock forms the Infinity Watch, entrusting each member with an Infinity Gem to protect (keeping the identity of the sixth member a secret even from his fellow Infinity Watch-members). Under the Gauntlet's influence, Warlock is not in his right mind, and even he wondered if he had made the right choices later on.