Get the Broom!

Achievement in Slayer: Skill. Back to all achievements or the slayer planner.

Scorpions and Spiders.

The mobs whose race it names, least faction loss first, then those matched by a word of their name only, which may count as another race.

Mob	Zone	Level	Seen	Faction per kill
a jungle spiderling	The Feerrott	1-3	1002	no faction loss (16 kills)
a jungle spider	The Feerrott	3-5	653	no faction loss (29 kills)
a spiderling	New Sebilis Expedition	1-3	577	no faction loss (43 kills)
a dune spiderling	The Northern Desert of Ro	4-6	409	no faction loss (15 kills)
a Nektulos widow	Lake Nerius	7-9	376	no faction loss (4 kills)
a lava duct crawler	Nagafen's Lair	43-45	333	no faction loss (108 kills)
a wooly spiderling	Everfrost Peaks	1-3	328	no faction loss (7 kills)
a crab spiderling	The Rathe Mountains	1	318	no faction loss (45 kills)
giant wooly spider	Permafrost Keep	43-47	303	no faction loss (20 kills)
a giant wooly spider	Everfrost Peaks	7-9	297	no faction loss (59 kills)
rogue clockwork	The Steamfont Mountains	1-10	268	no faction loss (138 kills)
a spiderling	Nektulos Forest	1-3	247	no faction loss (5 kills)
a rock spiderling	Butcherblock Mountains	2	228	no faction loss (4 kills)
a widow hatchling	The Greater Faydark	2	198	no faction loss (9 kills)
a desert spiderling	The Northern Desert of Ro	1-3	196	no faction loss (13 kills)
a gigantic wooly spider	Everfrost Peaks	20-24	172	no faction loss (32 kills)
a widow hatchling	Toxxulia Forest	2	160	no faction loss (5 kills)
a large widow	The Greater Faydark	4-6	143	no faction loss (3 kills)
a large spider	Nektulos Forest	2-4	132	no faction loss (4 kills)
a large wood spider	Toxxulia Forest	3-5	126	no faction loss (3 kills)
a giant spider	The Lesser Faydark	7-9	117	no faction loss (5 kills)
a spiderling	Misty Thicket	1-3	109	no faction loss (3 kills)
a large wooly spider	Everfrost Peaks	2-4	100	no faction loss (3 kills)
a large wood spider	Misty Thicket	3-5	99	no faction loss (11 kills)
a large widow	Toxxulia Forest	4-6	91	no faction loss (4 kills)
a giant yellow recluse	The Steamfont Mountains	8-10	87	no faction loss (52 kills)
a dune tarantula	The Oasis of Marr	11-13	80	no faction loss (4 kills)
a bloody terrorantuling	The Southern Desert of Ro	19-21	68	no faction loss (28 kills)
giant wooly spider	Permafrost Keep - Raid	43-46	62	no faction loss (57 kills)
runaway clockwork	The Steamfont Mountains	1	60	no faction loss (3 kills)
a spiderling	Toxxulia Forest	1-3	59	no faction loss (3 kills)
a large spider	The Qeynos Aqueduct System	2-4	51	no faction loss (23 kills)
a large yellow recluse	The Steamfont Mountains	5-7	48	no faction loss (2 kills)
a noxious spider	Nagafen's Lair	43-45	47	no faction loss (24 kills)
a stone spider	Nagafen's Lair	44-46	47	no faction loss (19 kills)
a giant spider	The Western Plains of Karana	7-9	47	no faction loss (5 kills)
a giant spider	West Commonlands	7-9	46	no faction loss (12 kills)
a sludge spiderling	The Qeynos Aqueduct System	1-3	38	no faction loss (12 kills)
a giant spider	East Commonlands	7-9	37	no faction loss (40 kills)
a dune tarantula	The Southern Desert of Ro	11-13	30	no faction loss (7 kills)
a spinechiller spider	The Plane of Fear	48-52	24	no faction loss (81 kills)
a spiderling	The Lesser Faydark	9-11	16	no faction loss (4 kills)
a spinechiller spider	The Plane of Fear - Raid	52	8	no faction loss (17 kills)
a desert tarantula	The Southern Desert of Ro	7-9	8	no faction loss (2 kills)
a spiderling	The Western Plains of Karana	2-4	5	no faction loss (8 kills)
a giant black widow	Najena	28-30	3	no faction loss (8 kills)
Clockwork XXA	Ak'Anon	20-22	4	King Ak`Anon -15, Eldritch Collective -2, Gem Choppers -2, Dark Reflection +5, Meldrath +5
a spiderling	Lake Nerius	1-3	223	not seen
a Nektulos spiderling	Lake Nerius	3-5	193	not seen
a giant widow	Lake Nerius	9-12	192	not seen
a spiderling	The Steamfont Mountains	1-3	170	not seen
a tomb spiderling	New Sebilis Expedition	4-6	138	not seen
a large spider	Butcherblock Mountains	2-4	90	not seen
a spiderling	East Commonlands	1-3	78	not seen
a desert tarantula	The Northern Desert of Ro	7-9	58	not seen
a domesticated hatchling	The Rathe Mountains	1	36	not seen
a giant widow	Toxxulia Forest	8-10	24	not seen
obsolete model	Ak'Anon	1-4	22	not seen
Cargo Clockwork	The Steamfont Mountains	30	19	not seen
a giant wood spider	Misty Thicket	7-9	18	not seen

and 34 more mobs.