Event created by
Firemakers
GREGOROVIC MASS
Where: Sliske's Necropolis, The Heart of Gielinor
When: Thursday daily reset (00:00 game time)
Requirements: 80 Prayer, 40 Sliske kill-count (20 if you have the reputation reduction)
GEAR/LEVEL RECOMMENDATIONS AND OPTIONAL BOOSTS:
(T80 Necro is also a solid choice)
Where is the Heart of Gielinor?
The Heart of Gielinor is located west of Nardah, which can be travelled to via Magic Carpet from Shantay Pass in southern Al-Kharid
WHERE IS SLISKE'S NECROPOLIS?
Sliske's Necropolis is located in the north-east corner of the Heart
How do I get kill-count?
In order to reach the required kill-count, you need to kill the following monsters:
ANY OTHER QUESTIONS FEEL FREE TO ASK 
LET'S HAVE SOME FUN AND HOPE FOR SOME DROPS!