Warning! This article contains spoilers for Dungeons & Dragons: Honor Among Thieves.Simon's story in Dungeons & Dragons: Honor Among Thieves ignored two rules from the wider Dungeons and Dragons universe. Honor Among Thieves establishes Simon as the party's sorcerer early in the film before he goes absent due to the story focusing on Edgin and Holga reuniting with Forge and Kira. Simon eventually returns to the story, when it is made clear a sorcerer is needed for Edgin's mission.
The story places Simon as an integral character throughout much of Dungeons & Dragons: Honor Among Thieves. Due to his magic capabilities, the characters place a lot of stock in Simon as their only hope when concerning spellcasting. However, this complete faith in Simon to provide the party with magic actually ignores two other Dungeons and Dragons rules, something that could be fixed and further explored in a sequel to Honor Among Thieves after its box-office success.
D&D Rules Should Allow Edgin & Doric To Cast Spells
According to the wider rules of Dungeons and Dragons, both Edgin and Doric should have been capable of casting spells. While Simon is a sorcerer, a class whose magic is much stronger than that of a bard or druid, the latter two classes have always been capable of magic in D&D. Bards are often shown to use magic through music, something which Dungeons & Dragons: Honor Among Thieves failed to show through Edgin's character.
In the case of druids, they can cast spells at any level. While Honor Among Thieves shows Doric regularly using her Wild Shape ability, this is something that all druids possess and does not count as a magic spell. Through Simon, the only magic user in the film is the sorcerer, something that actually benefits the film as a result despite the ignorance of D&D's rules.
Honor Among Thieves' Magic Change Was Good For The Party
If both Doric and Edgin had been able to wield magic in the same way as Simon in Dungeons & Dragons: Honor Among Thieves, it would have put less emphasis on Simon's story. Given that Simon was the sole hope of success for much of the film's final act, his character arc of learning to have the confidence needed to be a good sorcerer would have been diminished if Edgin or Doric could also use magic. In stripping magic away from the film's bard and druid classes, Simon's sorcerer story worked much better in Honor Among Thieves.
Similarly, this change made it so that every member of the party had something unique and special to offer. Holga had her strength, Doric her shape-shifting, and Edgin his planning and wit. Simon was then utilized as the character who brought magic to the table, something that would have been less special if Edgin and Doric's magical abilities were adapted. In this sense, ignoring two of D&D's class rules allowed Dungeons & Dragons: Honor Among Thieves' core ensemble to shine, with each member having their own unique abilities that did not overlap with one another.