CMS defeated Pink Been?!

타임리스 펜던트
(Timeless Pendant)
Level 140
incSTR 9
incDEX 9
incINT 9
incLUK 9
Weapon Defense 126
Magic Defense 126
Avoid 28
Slots 3
Level 1: (80 EXP)
STR 2-4, DEX 2-4, INT 2-4, LUK 2-4, WDEF 20-30, MDEF 20-30, Avoid 2-4
Level 2: (90 EXP)
STR 2-4, DEX 2-4, INT 2-4, LUK 2-4, WDEF 20-30, MDEF 20-30, Avoid 2-4
Level 3: (100 EXP)
STR 2-4, DEX 2-4, INT 2-4, LUK 2-4, WDEF 20-30, MDEF 20-30, Avoid 2-4
Level 4: (110 EXP)
STR 2-4, DEX 2-4, INT 2-4, LUK 2-4, WDEF 20-30, MDEF 20-30, Avoid 2-4
Level 5: (120 EXP)
STR 2-4, DEX 2-4, INT 2-4, LUK 2-4, WDEF 20-30, MDEF 20-30, Avoid 2-4

9% probability.

the 9% refers to the chance of getting for instance a str upgrade of 2-4?
and is there any upgrade thingy known for this yet?