I think we need another chat, for raiding... I thought this before for Pillar Raids, to get everyone in certain teams, it would be easier with a separate chat but now with the added card battling, we definitely need an extra chat or how are you going to communicate efficiently with everyone?
Also, I think the "hard" boss needs to be easier, because it will be impossible for those "free" users thus making it pointless for them.
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The private chat will soon be replaced with a raid chat. the "hard" boss will be nerfed further soon.