Pendel Codagio

Gnomish inventor who created the Orrery of the Wanderer during The Great Serpent War, then deemed it too powerful and dismantled it into seven pieces that have been "not un-lost to time". As Annu Adabra put it, he believed that "even if the world were safe from Turmoil, it wouldn't be safe from the Orrery".
Pendel was part of the project to construct the Invictus Una. He later lived to regret a lot of the things he had built, and he has seemingly disappeared off the face of the earth. Many believe that he may have committed suicide from guilt of all the terrible things that had happened to the natives and people who had lived around the area where the wall was constructed over / around.
Sometime before the present, he struck a deal with Mirage Prime and was gifted powers to manipulate time using the power of sound and music. He had a lair atop a giant snail in The Phantasmagoria, called "The Wandering Temple". He also borrowed a name from gnomish folklore, "The Metronome Man", to use when interacting with the rest of the world.
Driven by his guilt, he worked to recover the pieces of his Orrery, put them back together, and use it to resurrect the Great Serpent. With the help of Dennis Donahue and The Hounds Guild, he managed to gather all the pieces except for the Rotor of Return, which had somehow made it into the hands of the party — even after they had given it to Jack.
Unable to either kill the party directly or get them to give him the Rotor willingly, he started tinkering with the remaining parts of the Orrery to configure it in a way where he wouldn't need it. This took quite some time, however, and the party were able to catch up with him before he could put his full plan into action, destroying his machine.
He diverted his simulacra in an attempt to rewrite history so that the party would never have grouped up in the first place, hoping to at least stall them long enough for him to finish his plan, but Donahue brought them back too early. In the ensuing battle, something prevented Prime from reaching Pendel to finish him off (as he had done with Baxton and Vicra), but Grogery Daointaar acted on some posthumous advice from Baxton — who had been keeping his own soul from Prime by hiding it in a Ring of Mind Shielding — and bridged the connection, sacrificing himself to allow Prime to break through and take Pendel's soul at last.