Slayer task/Fossil Island wyverns
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| Fossil Island Wyverns | |||||||||||||||||||||||||||||
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| Requirements | |||||||||||||||||||||||||||||
| Skills |  66 | ||||||||||||||||||||||||||||
| Combat level |  60 | ||||||||||||||||||||||||||||
| Other | Completion of Bone Voyage | ||||||||||||||||||||||||||||
| Task amounts (extended) | |||||||||||||||||||||||||||||
| Chaeldar | 10-20 (55-75) | ||||||||||||||||||||||||||||
| Konar | 15-30 (55-75) | ||||||||||||||||||||||||||||
| Nieve | 5-25 (55-75) | ||||||||||||||||||||||||||||
| Duradel | 20-50 (55-75) | ||||||||||||||||||||||||||||
| Advanced data | |||||||||||||||||||||||||||||
| Icon ID | 21507 | ||||||||||||||||||||||||||||
Fossil Island Wyverns are a Slayer monster requiring 66 Slayer to kill. A combat level of 60, as well as the completion of the quests Elemental Workshop and Bone Voyage, is required for them to be assigned as a slayer task.
Similarly to their skeletal cousins, Fossil Island Wyverns use both melee and an icy breath. The icy breath requires the use of an elemental shield, dragonfire shield, dragonfire ward, or ancient wyvern shield in order to take reduced damage from the breath; the latter also provides immunity from being frozen. Protect from Magic can also be used but only provides half the damage reduction of the prior protections. Antifire potions of any type and the anti-dragon shield do not work to mitigate icy breath.
There are four types of wyverns that fall under this category, of which three can be fought at 66 Slayer and the other at 82 Slayer.
For players seeking a quick clear of the task, Spitting Wyverns are the best to kill, as they can also use a very weak ranged attack in place of the ice breath. Long-tailed Wyverns can also be killed and while they have a typeless ranged attack, they will only use it if the player is not in melee distance. Taloned Wyverns should be avoided, as they can use their typeless ranged attack even when the player is in melee distance. Many players also wish to purchase the Stop the Wyvern reward as a way to block the task without using the blocklist. This is because the Wyverns on fossil island are not particularly profitable, do not give good experience, and aren't the best for points.
At level 82 Slayer, the Ancient Wyvern can be killed for the purposes of this slayer task. These, much like the Taloned Wyvern, are often ignored, as they are a much stronger version of them with higher stats. They can also use a typeless ranged attack from any distance.
Wyverns may drop Fossil Island fossils of various sizes. Both caves have a Fossil Storage box by their respective entrances.
Shield Comparison Against Icy Breath
| Icon | Shield Name | Reduces Damage | Prevents Freeze | Notes |
|---|---|---|---|---|
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Anti-dragon shield | No | No | |
 
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Elemental or Mind shield | Yes | No | Obtained during Elemental Workshop I and II. |
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Dragonfire shield | Yes | No | Requires  90 , an Anti-dragon shield, and a Draconic visage to create.
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Dragonfire ward | Yes | No | Requires 90 , an Anti-dragon shield, and a Skeletal visage to create.
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Ancient wyvern shield | Yes | Yes | Requires 66 ,  66 , an Elemental shield, and a Wyvern visage to create.
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Slayer Unlocks
| Unlock | Points cost | Notes | |
|---|---|---|---|
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Stop the Wyvern | 500 | This Unlock allows you to block fossil island wyverns without it counting towards your block list, albeit much more expensive than using a block list slot in terms of slayer points used. |
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Wyver-nother two | 100 | The extension unlock for fossil island wyverns, which brings all tasks amounts up to a range of 55-75 assigned per task. |
Monster Variants
| Monster | Combat Level | Slayer XP | Locations | Notes |
|---|---|---|---|---|
| Spitting Wyvern | 139 | 205 |
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Attacks with melee, ranged, and icy breath. Engage from a distance and use Protect from Missiles to negate all but their icy breath attack and melee attacks. Requires level 66 Slayer to kill. |
| Taloned Wyvern | 147 | 205 |
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Attacks with melee, typeless ranged, and icy breath. Can use the typeless attack from any distance, making it less favourable to kill. Requires level 66 Slayer to kill. |
| Long-tailed Wyvern | 152 | 205 |
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Attacks with melee, typeless ranged and icy breath. Will only use its typeless attack when the player is out of melee distance. It is therefore recommended to engage at melee distance with Protect from Melee active. Requires level 66 Slayer to kill. |
| Ancient Wyvern | 210 | 315 |
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Attacks with melee, typeless ranged, and icy breath. Can use the typeless attack from any distance, making it less favourable to kill. Has higher stats but better drops compared to the other wyverns. Requires 82 Slayer to kill. |
Location Comparison
| Location | Maplink | Amount | Multicombat | Cannonable | Safespottable | Notes |
|---|---|---|---|---|---|---|
| Wyvern Cave,
east of Museum Camp |
Show map | No | No | No | ||
| Task-only Wyvern Cave,
inside the Mushroom Forest |
Show map | No | No | No |
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Equipment
Players simply tank the wyverns by maximising their ranged Defence via Barrows, Bandos equipment or Justiciar armour (if affordable). Optimise ranged defence and use Protect from Melee, since their ranged attack hits through protection prayers. High-level food like anglerfish or sharks is recommended. The player's Prayer points can also/instead be used on Piety, and bringing at least two prayer potions is strongly advised, as well as being easily paid for by the wyvern bones collected. Note: The ancient wyvern shield is the only shield that grants immunity against the freezing effect from a wyvern's icy breath. The dragonfire shield, mind shield or elemental shield can be used, but you will occasionally become frozen. Anti-dragon shield will NOT work
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Inventory
- 1 Divine super combat potion
- 3-4 Prayer potions
- An emergency teleport (optional)
- Sharks or better
- Herb sack (optional; if doing the ancient wyvern)
- Seed box
- Rune pouch
- Bonecrusher (optional; if not selling wyvern bones)
Protect from Melee with Sunfire fanatic, Proselyte, or Initiate armour equipped. The player may also choose to use Piety (and optionally Preserve) or weaker accuracy-boosting prayers to speed up kills, but at greater cost. At least one prayer potion will be needed using this setup, and more if using boosting prayers. Verac's equipment has significantly higher Defence than Proselyte armour with slightly less Prayer bonus and is a good choice if you are looking for a compromise between Defence bonuses and Prayer bonuses.
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Inventory
- 1 Divine super combat potion
- 3-4 Prayer potions
- An emergency teleport (optional)
- Sharks or better
- Herb sack (optional; if doing the ancient wyvern)
- Seed box
- Rune pouch
- Bonecrusher
Magic can be a feasible method to kill the wyverns if players have high Magic levels and can afford the upkeep cost on powered staves. Although Melee is much more profitable, Magic can still be utilised if the player wishes to do so, but it is strongly recommended to stand several spaces away from the wyvern to avoid Melee damage. Mystic Might or Augury can also be used to speed up kills.
Inventory
- Imbued heart
- 3-4 Prayer potions
- An emergency teleport (optional)
- Sharks or better
- Herb sack (optional; if doing the ancient wyvern)
- Seed box
- Rune pouch
- Bonecrusher
- Rune pouch with runes for either Resurrection spells or Wind Surge + High Level Alchemy, depending on if you are using a powered staff autocasting staff.
Although players will get slower kills, Ranged can still be used. If players wish to do so, be aware of the negative bonuses that both the Ancient and Dragonfire shields possess. Nonetheless, it is strongly recommended to stand several spaces away from the wyvern to avoid Melee damage. Eagle Eye or Rigour can also be used to speed up kills. If killing Spitting Wyverns then the player can pray Protect from Missiles to negate all damage except for their icy breath.
Inventory
- Divine ranging potion
- 3-4 Prayer potions
- An emergency teleport (optional)
- Sharks or better
- Herb sack (optional; if doing the ancient wyvern)
- Seed box
- Rune pouch
- Bonecrusher