Vesper's Critical Damage
Increase P. Critical Rate by 15, M. Critical Rate by 2, and Speed by 10 for 10 minutes. Recovers 5% of the standard short-range physical damage inflicted on the enemy as HP.
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.