they basically extended 15r to 20r.
here are some links about it:
http://forum.wl.igg.com/viewthread.php?tid=93223
https://www.youtube.com/watch?v=O5JmHxcmzlM
http://forum.wl.igg.com/viewthread.php?tid=90411
Leo Server:
Main Team: Killerkev, iluvkev, ChibiKev, KevyKev. (All rb at lvl 199)
Burst Teams: KeyCey, KeyCay, KayCey, KayCay. (All rb at lvl 180)
Others: ilovekev, xKev. (Non-rb)
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