Fossil Island wyverns

Slayer 66 Combat 139 205 xp Members dragon

Assigned by

Chaeldar 10–20

Konar 15–30

Nieve 5–25

Duradel 20–50

Requirements

Slayer Level66
Combat Level60
Also NeedsCompletion of Bone Voyage

Combat & Weakness

Attack StyleSlash, Ranged, Icy breath
Max Hit9 (Melee), 8 (Ranged), 50+ (Icy breath)
Hitpoints200
AggressiveYes
Weak To Air (+25%)

Stab 50 Slash 70 Crush 70 Magic 140 Ranged 70

No notable immunities

Locations

Also counts: Spitting, taloned, long-tailed wyvern, Ancient Wyvern

Watch Out

Required Gear

Elemental shield

Mind shield

Dragonfire shield

Ancient wyvern shield

One of these is needed to fight this task's monsters (or a variant) — from the OSRS Wiki's equipment table.

Icy breath freezes you and drains stats without an elemental/mind/dragonfire shield or ward. Ancient wyverns hit considerably harder than the spitting/taloned tier.

— ezSlayer editorial, not wiki data

Collection Log (3)

Granite longsword 1/512

Granite boots 1/2,560

Wyvern visage 1/12,000

Log membership cross-referenced against the wiki's collection log item registry at build time.

Loot & Odds · Spitting Wyvern

Assigned by

Task size 151 (1–300)

At 151 kills: 5.73% chance of at least one Granite boots.

100% (1)

	Item	Qty	Rate	Chance in task	Expected
151	Wyvern bones	1	Always	100%	151

Weapons and armour (8)

	Item	Qty	Rate	Chance in task	Expected
5	Air battlestaff	1	1/30.7	99.3%	4.9
15	Battlestaff (noted)	3–5 (noted)	1/41	97.6%	14.7
2	Adamant battleaxe	1	1/61.5	91.6%	2.5
2	Adamant full helm	1	1/61.5	91.6%	2.5
2	Rune pickaxe	1	1/61.5	91.6%	2.5
2	Adamant platebody	1	1/61.5	91.6%	2.5
	Granite longsword	1	1/512	25.6%	0.29
	Granite boots	1	1/2,560	5.73%	0.06

Runes and ammunition (8)

	Item	Qty	Rate	Chance in task	Expected
295	Adamant arrow	38–42	1/20.5	99.95%	295
246	Water rune	50	1/30.7	99.3%	246
74	Chaos rune	15	1/30.7	99.3%	73.7
74	Law rune	15	1/30.7	99.3%	73.7
74	Death rune	15	1/30.7	99.3%	73.7
74	Blood rune	15	1/30.7	99.3%	73.7
12	Soul rune	10	1/123	70.8%	12.3
26	Runite bolts	12–30	1/123	70.8%	25.8

Herbs (6)

	Item	Qty	Rate	Chance in task	Expected
7	Grimy kwuarm	2	1/43.7	97.0%	6.9
6	Grimy cadantine	2	1/54.7	93.8%	5.5
6	Grimy dwarf weed	2	1/54.7	93.8%	5.5
4	Grimy lantadyme	2	1/72.9	87.6%	4.1
2	Grimy ranarr weed	1	1/61.5	91.6%	2.5
2	Grimy torstol	1	1/61.5	91.6%	2.5

Seeds (17)

	Item	Qty	Rate	Chance in task	Expected
29	Seaweed spore	12	1/61.5	91.6%	29.5
3	Ranarr seed	1	1/58	92.8%	2.6
	Snapdragon seed	1	1/1,098	12.9%	0.14
	Torstol seed	1	1/1,398	10.2%	0.11
1	Watermelon seed	15	1/1,538	9.36%	1.5
	Willow seed	1	1/1,538	9.36%	0.1
	Mahogany seed	1	1/304	39.2%	0.5
	Maple seed	1	1/1,708	8.46%	0.09
	Teak seed	1	1/167	59.7%	0.91
1	Yew seed	1	1/115	73.3%	1.3
	Papaya tree seed	1	1/2,196	6.65%	0.07
	Magic seed	1	1/2,563	5.72%	0.06
	Palm tree seed	1	1/3,075	4.79%	0.05
	Spirit seed	1	1/3,844	3.85%	0.04
	Dragonfruit tree seed	1	1/5,125	2.90%	0.03
	Celastrus seed	1	1/7,688	1.95%	0.02
	Redwood tree seed	1	1/7,688	1.95%	0.02

Resources (5)

	Item	Qty	Rate	Chance in task	Expected
1473	Pure essence (noted)	150 (noted)	1/15.4	>99.99%	1473
22	Adamantite bar (noted)	2–4 (noted)	1/20.5	99.95%	22.1
258	Teak logs (noted)	35 (noted)	1/20.5	99.95%	258
46	Snape grass (noted)	10–15 (noted)	1/41	97.6%	46
6	Runite ore (noted)	1–2 (noted)	1/41	97.6%	5.5

Other (7)

	Item	Qty	Rate	Chance in task	Expected
20	Lobster	2	1/15.4	>99.99%	19.6
40512	Coins	3,000	1/11.2	>99.99%	40512
9	Prayer potion(4)	1	1/17.6	99.99%	8.6
2	Adamant crossbow (u)	1	1/61.5	91.6%	2.5
5	Calcite	2	1/61.5	91.6%	4.9
5	Pyrophosphite	2	1/61.5	91.6%	4.9
98	Volcanic ash	20–60	1/61.5	91.6%	98.2

Tertiary (8)

	Item	Qty	Rate	Chance in task	Expected
1126	Numulite	5–24	1/1.9	100%	1126
4	Unidentified small fossil	1	1/35	98.7%	4.3
2	Unidentified medium fossil	1	1/70	88.6%	2.2
2	Unidentified large fossil	1	1/87.5	82.4%	1.7
	Unidentified rare fossil	1	1/350	35.1%	0.43
2	Brimstone key	1	1/74	87.2%	2
1	Clue scroll (hard)	1	1/118	72.3%	1.3
	Wyvern visage	1	1/12,000	1.25%	0.01

Where to Go

✓ verified against the OSRS Wiki · revision 15266266 · fetched 2026-08-04 · CC BY-NC-SA 3.0