Bartz Klauser (Winota, Joiner of Forces) Magic has a very small number of commanders I dont think you can build fairly without resorting to playing Draft chaff, and Winota, Joiner of Forces is near the top of the list
Returning a fetch land from your graveyard to your hand every turn means steady land drops, repeated color fixing, and ongoing shuffle access
Each one has the artifact subtype "Powerstone" and the ability ": Add
Call Forth the Tempest Deadly Tempest Dragon Tempest Dragonhawk, Fate's Tempest Fateful Tempest Fire Tempest Living Tempest Shu Yun, the Silent Tempest Tempest Angler Tempest Caller Tempest Djinn Tempest Drake Tempest Efreet Tempest Hart Tempest Hart Tempest Harvester Tempest Hawk Tempest Owl Tempest Technique Tempest of Light Tempestra, Dame of Games Thrasta, Tempest's Roar Zaffai and the Tempests
Plenty of rares and even uncommons outperform mythic rares in competitive play
Tormods Crypt and Grafdiggers Cage just seem laughably bad at fighting Treasure Cruise