Okay,
so this idea is a minigame, which has to do with strategy.
Say you walk into a city, hopefully the new alien oasis city, and you see a circle arena
you then talk to *bob*(lets go with that) the guard, and pay bob about...100 coins to fight the challenger In the arena.
Now the challenger is an NPC that gets harder everytime you defeat it
there are 10 dufficulty levels the NPC goes to, from 1-10, 10 being the most challenging.
The boss uses all 3 classes of attack (int,dex,str) and you have to kite, push, unbuff,stun,break armour,freeze, kill healers/minions in order to kill it.
If you defeat the boss at round 10, you talk to *joe*, the rewards NPC, where you recieve a new item (vanity or other) and an achievement on your avatar page.
Also, no elixirs are allowed
you can keep doing the challenge for points that go toward pvp rewards that you claim at joe.
The boss is designed for level 50s only and is different for each class due to its skills.

Note this is just off the top of my head, i may edit this ALOT.

Also, for all RS players, Yes. This is the jad of PL.