Been thinking over becoming a patron and getting story mode for the longest time, not sure when i can, but recently i read on reddit that apparently you can do story mode just once and then you can't replay it
doesnt sound true but I wanna be sure
eh, totally not true
Story-Mode is similar to main game, but has linear plot and one map layout for every walkthrough. It also has a plot point where your class is chosen for you, the Enchantress. It makes it a challenging mode. Encounters are different.
But if you are patron, you can create as many characters there as you want and save the game as usual.