Faust was a powerful wizard on his life, people said that his wits would put demons to shame, a demon decided to put that to test and convinced him to make a pact, faust agreed, and now with access to even greater knowledge he procceded to make pacts with even more patrons, but his lucky ran out and mephistopheles, his original patron, got air of what he was doing and conspired with the others patrons he made pacts with to kill him, but Faust was prepared, even with an army on his door he wasn't afraid, even before being a warlock he was already a legendary wizard, and with all the knowledge of all the planes of existence he built his defence, years of non-stop fighting followed suit, the entire landscape sorched by fire, everything still alive twisted by the most foul of magics, and nothing was allowed to stay dead for long... Mephistopheles realized he wouldn't be able to overcome faust with sheer power, so the lord of schemes decided a different approach, he choose a party of heroes, appearing as a deity to them, he stroke a deal, and gave thema jewl saying that they should seal away the evil wizard inside that jewl, the party was strong, better than an army of random feys and skeletons, but they were no match for Faust, they managed to seal him away, but as soon as they did the entire tower collapsed killing the heroes and leaving their souls to mephistopheles to feast and Faust to be forever imprisioned within the rumble. Faust was prepared for something like this to happen but he didn't expect it to be this strong, the lord of lies had really outdone himself this time, but one of his servants, a small imp which he gifted the blessing of immortality, to forever serve him, managed to find the jewl under the rumble, Faust discovered he could communicate with someone near the gem if their minds were sufficiently shaken, he spent the next hundreads of years trying to figure out a way out but his servant wasn't strong enough and without being able to affect the outside world he was out of options, eventually as the years passed he realized he might be able to do a little more if he had someone to channel his powers through, so he ordered his familiar to find the best blacksmith alive and encrust him on an armor so he could have an avatar with proper skills and able to finally free him from his cursed prison...

Faust was a warlock that managed to fool the devil on his own game, at one point he ruled a great part of the world, all feared his powers, and said that he could kill you with a simple glance, thus they started calling him the sovereign of fear.

Faust is an outstanding planner, before he even begins his plans he already sets everything in motion to work in his favor.

A powerful lust for knowledge guided Faust to his misdeeds, no price was too high for power.

He wishes to be free from his shackles and once again resume his rule over this world, and even more, to rule the inferior planes and outcast the fiends who imprisioned him