MapleStory/Resurrection of the Hoblin King

Requirements

 * Party of 2 to 6 (No AFKers)
 * Level 150+ (Recommended level: 150-250)

Pre-PQ
Before you start, you will land on this place. Have your party leader click on Shammos. The party will then start the PQ. The portal on the top right leads to a jump quest to obtain a HP potion for Shammos.

Stage 1
This stage is easy, just eliminate all the monsters. AoE / Area of Effect skills work best. Then, have the leader talk to shammos to advance.

Stage 2 and 3
Escort Shammos across Ice Ravine 1 and 2 without him dying in the process. If you walk too far away from Shammos, he will call you back and within 30 seconds you MUST go back to him or you will fail the PQ.

Stage 4
Now the evil Shammos will unseal the lock and Rex will be summoned. Eliminate him. Skills that he will use:
 * Throwing attack that can be dodged easily
 * Dash
 * Area blind (you can only see a small radius)
 * Poison mist
 * Zombify (Heal will kill instead of giving HP, HP potions will have their effects -50%)

EXP reward
If you are level 150, you get 2,871,714 EXP. This amount increases by 2.5% per level. Round off each time it is formulated. At level 249, you will receive 21,751,944 EXP.