Different metallic as in the grey shades of not having loaded the model? If that's the case, you need to go to your graphic settings ingame and increase the number of concurrent player models to show.
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What is the best way to grind a 13* weapon?
Currently, you can run the Halloween EQ and hope you hit the giant Emper Latan Rappy and collect all the drops from it as they should contain the Emper Embrace affix on the fodder which should make grinding your gear way faster. You could also try buying fodder from the shop with Emper Embrace on them. Otherwise, keep collecting other fodder.
I keep getting an error despite having waited until the 1st of November in JPN to purchase AC again (Sega has a limit on how much you can buy per month): http://prntscr.com/h4g7nu
Can anyone tell me when I can buy AC again? I'm super confused.