Ancient Weapon Enchant Crystal (A-Grade)
10 % increase in enchant success rate. When enchant fails, the existing enchant value is retained. Attack power for A-grade sword, one-handed blunt, one-handed dagger, spear, and other weapons increases by 4 when enchanted. Attack power for sword, two-handed blunt, two-handed dualsword, and combat and dual-handed weapons increases by 5. Attack power for bow weapons increases by 8. Magic power for all weapons increases by 3. Attack and magic power increase two times after +4. Weapons enchanted by above 16 can be neither used, exchanged, nor dropped.
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.