Chronicle Cube - 90 times
Double-click to obtain Chronicle Support Pack. Use the item 30 times to get Greater Vital Stone (30-day), 60 times to get Codex of Consistency - Manuscript (10 pcs.), 90 times to get Codex of Consistency - Chapter 1 (10 pcs.).
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.