Carnage Bow Stave

How to get

Monster	Lv	How	Quantity	Chance
Enmity Ghost Ramdal boss	65	drop	3–9	70.1%
Eva's Guardian Millenu boss	58	drop	12–36	32.2%
Dark Omen Invader Warrior	73	spoil	1	4.09%
Alpine Cougar	69	spoil	1	3.38%
Requiem Lord	68	spoil	1	1.71%
Fanatic of Infinity	76	drop	1	1.26%
Dark Omen Invader Food	70	spoil	1	0.848%
Dark Omen Invader Elite Soldier	75	drop	1	0.7993%
Dark Omen Invader Magus	73	drop	1	0.6989%
Eye of Ruler	74	drop	1	0.6873%
Sly Hound Dog	72	drop	1	0.6545%
Canyon Bandersnatch	70	drop	1	0.4584%
Hot Springs Nepenthes	75	drop	1	0.4447%
Varka Silenos Hunter	78	drop	1	0.4402%
Hot Springs Buffalo	73	drop	1	0.3814%
Dark Omen Invader Elite Soldier	75	drop	1	0.3774%
Varka Silenos Recruit	77	drop	1	0.3724%
Alpine Cougar	69	drop	1	0.3629%
Hot Springs Bandersnatch	76	drop	1	0.3524%
Dark Omen Invader Priest	70	drop	1	0.233%
Vampire Soldier	71	drop	1	0.2327%
Skull Animator	68	drop	1	0.2136%
Ghost of Rebellion Leader	71	drop	1	0.2118%
Ghost of Rebellion Soldier	69	drop	1	0.2091%
Vampire Magician	72	drop	1	0.1843%
Alpine Cougar	69	drop	1	0.1732%
Alpine Grendel	68	drop	1	0.1712%
Kertang's Messenger	75	drop	1	0.1686%
Frenzy Stakato Soldier	68	drop	1	0.1678%

Chances are from the server scripts, without the server rates.