Skeletal Wyvern

Skeletal wyverns (Draconis Ossis) are very dangerous monsters which can drop Granite legs, and the rare Draconic visage. Level 72 Slayer is required to kill them. An Elemental shield, mind shield or dragonfire shield must be equipped when fighting them. They are the lowest leveled monster that drops the Draconic Visage.

Strengths and Weaknesses
The player must equip an Elemental shield, mind shield whilst fighting these or he/she will be hit for very significant damage (50+). Players can also use the Protect from Magic prayer to lower the max hit of the Ice breath attack, but it is not as effective as any of the shields. The Wyverns attack with melee, ranged, and a freezing-breath attack, which can freeze players making them unable to attack. They have high Defence, high Attack and high Hitpoints making them very challenging opponents. They also require 72 Slayer to kill.

Using protect from melee Prayer and Prayer potions is recommended as they hit fairly high and regularly. Players can still take damage from the freezing-breath attack but much less than if you don't. However, the attack in which they jump up and glow is a ranged attack. Therefore, ranging is possible with one-handed weapons because of the shield requirement, with the protect from Ranged prayer, only suffering damage from their ice breath. Taking several steps back while ranging them, and having the Ranged prayer activated will eliminate the chance of taking any damage.

Being undead makes them vulnerable to the effects of a Salve Amulet. The amulet also gives a +3 prayer bonus, allowing higher damage without using damage/accuracy-boosting prayers.

Locations
Asgarnian Ice Caves

Drops
100% drop: Wyvern bones
 * 12 Runite bolts
 * Mithril bolts
 * 30, 44, 132 or 220 Coins
 * 30 Air runes
 * 30 Water runes
 * 10 Chaos runes
 * 3 Law runes
 * 7 Blood runes
 * Super Attack Potion (1)
 * 10 or 11 Soul runes
 * 60 noted Pure essence
 * Black sword
 * Gem
 * Herb
 * Black axe
 * Snakeskin chaps
 * Dragon Dagger (P+) (rare)
 * Granite legs
 * Draconic visage (very rare)
 * Charms (Crimson are very common)
 * Dildo (always)