u/Fresh-Beat-4447

Hey Reddit, me and another person need some help with finding an arg

It's about a server of friends (I think?) where one player gets trapped by an evil entity and the entity tries to replace the player but the order of numbers and letters in his name is wrong or something like that. There are multiple non evil entities with different symbols like spades, hearts etc. on their heads, who try to communicate with other players but can't because their words are incoded with a Vigenère cipher (?) where the key words are their symbols

Adding a pic the other person drew in case it helps