After this time period, attack a Skeletal Wyvern and lure it behind an obstacle (e.g.

they don't move past a certain invisible border).

Skeletal Wyverns are Slayer monsters that require a Slayer level of 72 in order to be harmed. To safespot Skeletal Wyverns, first make sure to lose their aggressiveness. a wall that is sticking out). Aggressiveness is lost automatically after a player has spent 10 minutes in the same area (i.e.
Slayer masters will not assign Skeleton Wyverns as a slayer task until the player has completed the Elemental Workshop I quest.1 , Unlike other Wyverns, Skeletal Wyverns do not drop the wyvern visage; instead they drop the draconic visage. Like other wyverns, they require an elemental shield, mind shield, dragonfire shield, dragonfire ward, or ancient wyvern shield to reduce damage from their icy breath; however, it is not required to be slain. They are found at the end of the Asgarnian Ice Dungeon. Skeletal Wyverns are assigned by Chaeldar, and after the Slayer master task rebalance update on 10 September 2015, also by Nieve and Duradel.