The Magister
I will post a video guide soon, keep an eye out.
The Magister is a high level solo boss found in the depths of the Sophanem Slayer Dungeon.
The fight can be accessed through the Diamond-tier donator ;;bp command, or by running through the Dungeon itself.
When you reach the First Gate, you have arrived.
What you need:
99 Range (recommended)
99 Constitution (recommended)
95 Prayer, or 99 Prayer and Desolation unlocked
115 Slayer, which is 63,555,443 xp - you can use the ;;virtual command to toggle virtual skill levels.)
High tier o