Ok battle arena works like that:
You duel someone from this academy,after that post your duel here in this way:(Yourusername) vs (Opponentsusername) + ScreenShot or configure of another player!
Experience:
T=Very high rank(Admin,Mod,Tester)
H=High Rank(Obelisk or BW Armor Master)
N=(Ra yellow or Sirocco)
L=(slifer or bora)
T vs T Duel win 3% +30 Credits
T vs H Duel win 3% +30 Credits
T vs N Duel win 2% +20 Credits
T vs L Duel win 1% +10 Credits
H vs T Duel win 4% +30 Credits
H vs H Duel win 3% +30 Credits
H vs N Duel win 2% +20 Credits
H vs L Duel win 1% +10 Credits
N vs T Duel win 5% +40 Credits
N vs H Duel win 4% +40 Credits
N vs N Duel win 3% +30 Credits
N vs L Duel win 2% +20 Credits
L vs T Duel win 6% +50 Credits
L vs H Duel win 5% +50 Credits
L vs N Duel win 4% +40 Credits
L vs L Duel win 3% +20 Credits
That was it enjoy!