The chance of receiving the buff is increased by [[运气]] buffs from food or [[幸运戒指]], but not daily Luck. It is calculated<ref name="ring_onmonsterslay"/> as <code>0.1 + (Luck Level / 100)</code> meaning each additional level of [[运气]] buff increases the odds by 1%: +1 Luck increases the base chance from 10% to 11%, +2 Luck increases it to 12%, and so on.