Dark Endings

Start
Talk to Xenia about some strong enemies. Then, when asked the correct question, she will talk about this quest.

Enemies
There are really strong enemies in this quest. It is possible to team this, but max of 2 people.

Rewards
Some really good rewards are earned in this quest:
 * 50,000 experience in each skill
 * 200,000 coins
 * Access to the Legendary Blade of the Gods. (240 strength bonus, 120 stab, 180 slash, 80 crush as well as 10+ def to all defensive stats. also gives +10 prayer.)