Pontus Stone
Required for teleporting to the safest area of Fafurion's Nest. The Water Dragon gave the stone to his high priest Cyrax for safekeeping. You can take it away from him for a time being, but eventually it will be returned to Cyrax.
Not dropped by monsters.
Cannot be spoiled.
The chances are official (x1). On servers with x10, x100 and higher rates, drop and spoil come more often.