Desperate to help his girlfriend, Jackie (Genevieve Kang), remember magic as her 18th birthday approached, Tyler spent a lot of season two trying to track down the Memory Key. That particular key was made two decades prior by Duncan Locke (Aaron Ashford), the kids’ uncle, at the behest of their father, Rendell (Bill Heck as an adult, Nick Dolan as a teen). He and his high-school friends—who dubbed themselves “the Keepers of the Keys”—wanted the power to hold onto their supernatural knowledge. Though Duncan ended up living at Keyhouse with his late brother’s family, he had never used the key on himself, so he doesn’t remember anything about magic, much less the Memory Key. Suffice it to say, it took some maneuvering to find it.
But to Tyler’s surprise, when presented with the chance to use the Memory Key, Jackie opted out. Then, she was turned into a demon—before dying in agony when the Alpha Key, which Tyler himself made trying to save her, killed both the demon and Jackie herself. This was (understandably) a lot for Tyler to take in, so at the end of season two, he headed out for a solo road trip ahead of his own 18th birthday after telling Bode and Kinsey he wouldn’t be using the Memory Key—and therefore wouldn’t remember magic or the keys when he returned.