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As for the interaction, it involves Arena of Glory, and it primarily matters in the late game
In practice, minimizing conflict of interest is a challenging issue to address when the reliance is based entirely on the opinion of the grader
2016-07-13 You can't make the affected player concede
I played a lot but never collected or actively traded them like I did with Pokmon
The one you should buy depends on what type of collector you are: Casual collector Competitive player Investor Do you just want to collect for fun