Apologies, those aren't the answers either. But you can take more guesses if you want. Since there's not a lot of players attempting this challenge this week. Must have been confusing lmao.
Your reason behind Lira answer is actually closer. Plus there's another clue in the custom card itself that no one has mentioned yet.
i like this kind of challenge with or without reward. hehehe i feel like im a detective that needs to solve the case hahaha.