The core area of the Skull Ruins.
This was a Disaster Zone, one level above a Frenzied Zone, where lifespan drained at a thousand times the normal rate!
That meant that here...
Staying for just nine hours would consume a year of lifespan.
If an ordinary human with fifty years of lifespan remaining were placed here, they would exhaust their lifespan and die in half a month.
Of course.
As long as Qin Feng remained in stealth, his rate of lifespan loss decreased by 90%.
In other words, to Qin Feng, this thousandfold-rate Disaster Zone was only equivalent to a hundredfold-rate Frenzied Zone!
Besides, Qin Feng now had over six thousand years of Non-Tradable Lifespan...
So he paid no attention to this system notification.
The moment Qin Feng jumped down through that pitch-black opening and reached the core area of the Skull Ruins, the final challenge began!
All kinds of bone-white Bone Demons rose and burrowed out of the surrounding ground, rushing at Qin Feng to kill him.
However...
Qin Feng could not see these Demons with his naked eyes at all.
Because this place was pitch-black, without a trace of light!
This was the greatest difficulty of the challenge.
Here, sight was useless. He had to kill monsters by hearing or use some special means.
To pass this challenge, a level 20 player needs at least 400 agility.
The higher the player's level, the higher the Demons' levels will be, and the less noise they'll make when moving. That means an even higher agility requirement to hear their movements...
Most importantly, he had to clear the lesser monsters first.
In the end, their corpses would combine into a Jadeite Tier boss, the Bone Spirit!
Only by defeating the Bone Spirit solo could a player receive the flying mount reward.