Soul Fragment
A fragment with a trace of the Evil Soul. Go to the Merchant of Mammon to exchange 100 Soul Fragments for Glittering Evil Soul, or 1000 Soul Fragments for Top-grade Glittering Evil Soul.
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.