Friendship Cube (30-day)
Lineage II is even better with friends! Double-click to obtain 1 extra pass to an instance zone. Also, you can obtain an Unbind Scroll for R-grade/ R95-grade/ R99-grade Weapon/ Armor. Can only be used once a day.
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.