Duel Arena. By speaking to Mubariz at the entrance of the Duel Arena
However due to OSRS gold the fact that there are numerous players, playing at once which allows for you to cause more damage, the experience gained here from utilizing such Runes, Arrows or Bolts is decreased to 25% of the original experience you'd gain for utilizing them. If you choose Arrows or Bolts you will be awarded 2,000 Arrows or Bolts.
Duel Arena. By speaking to Mubariz at the entrance of the Duel Arena it is possible to select if you wish to be awarded Arrows, Bolts, or Runes when you duel. On account of how this can readily be using for someone to gain expertise in the Magic Skill simpler (eg. Someone puts on full rune, vambraces and anything they could find to lower their own Magic Attack and throw Wind Strike or another weak spell on someone constantly so that they almost never perish and gain an unlimited number of magical experience, they max out.) In other words you can not use them to gain experience here. You'll be awarded 300 Catalytic Runes and 1,000 Elemental Runes in case you select Runes. If you decide on arrows you will be given 650 Spiritual Arrows.
Barbarian Assault. It simply does not make sense that you are being made to use your OWN Runes and Arrows in a match where you don't get experience for buy RuneScape Mobile gold utilizing them. However simply providing you Spiritual Arrows that will allow you to never change doesn't make much sense. Each number represents the level of this arrow.