[quote=@Legion02]
I'm sort of planning a power that would work pretty much like some magic system. But to what extend can I keep it mysterious? Do I have to explain the source of the power and all that and detail every single thing he can do or can I leave some 'moves' in the dark the power can grow with my character?
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I don't think that you would have to explain every single thing he can do if you don't want to. After all some mystery is nice. I do think that if you could give at least some detail as to some of the things he can do it would be preferred so we can get a better judge of your character while we decide if he is accepted.