It would be nice to be able to filter by additional criteria, like language and card condition. For example, I distinguish between paper cards and online cards using the card condition field: for paper I use near mint, for online I use mint. Other players may use this field to distinguish between different collections. It is a rather simple feature that could help a lot of users.
PS. How do I delete the post? I just found out about the Support & Feedback button! Sorry 
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