Scorpia
Scorpia is a powerful Wilderness boss capable of poisoning her opponents starting at 20 damage as well as hitting up to 16 with melee. Her lair, located beneath the Scorpion Pit, is filled with many Scorpia's offspring, which use accurate ranged attacks with a max hit of 2 and inflict poison starting at 6 damage.
Once Scorpia reaches 99 health or lower, she will summon two Scorpia's guardians which will continually heal Scorpia when within 3 tiles of her until they are killed or despawned. The guardians will not respawn if killed, and will despawn if they are too far away to heal Scorpia for 15 seconds.
An effective strategy is to exploit her low magic defence by using Ice Barrage to freeze her (Ice Burst, Ice Blitz, or Entangle will also work fine), staying out of melee range while attacking her with magic, and praying Protect from Missiles to prevent damage from Scorpia's offspring.
Guide, gear, inventory, locations, pictures and money making rates from the OSRS Wiki (CC BY-NC-SA 3.0).