Battle Skills Passive Training is very important and who knows better about it, than humans. Increases DPS by 2 times. Heroes with this skill Prince SimonDPS5Price50Lvl 50 ErzaDPS250Price4000Lvl 50 JeffreyDPS186e+3Price15e+6Lvl 50 ImaniaDPS69.6e+6Price65e+9Lvl 50 KatiputDPS5.4e+12Price36e+15Lvl 50 JohnDPS49.2e+12Price300e+15Lvl 75 SeraDPS110e+45Price15e+42Lvl 75 Gravedigger DashDPS5e+57Price10e+60Lvl 75