Mighty banshee

The mighty banshee is a stronger version of the Banshee and is first encountered in the quest Smoking Kills. They are found in the Pollnivneach Slayer Dungeon. Masked earmuffs, a Slayer helmet, a Full slayer helmet, a Mask of Mourning or a Helm of Keening must be worn to prevent stats from being dangerously reduced in addition to successive damage by the swirling dust. They attack with a long-ranged attack in melee style, so they cannot be safespotted.

They appear to have a weakness to Magic and a strong resistance to Ranged even though the stated weakness is Bolt. It might be an oversight.

Mighty Banshees can be used for making money, as they drop Pure Essence relatively frequently (23 noted).

Runes

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Armour and weapons

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Herbs and secondaries
Drops 2 random herbs at a time (do not have to be the same).
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Other

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Rare drop table drops

 * Note: This monster will drop 2 items from the rare drop table if it is accessed.

Universal drops
Mighty banshee