Goshnar's Taint highscore is related to killing the bosses and last boss,
Killing 1 normal boss gives 1 point
Killing the last boss gives 10 points
So the score is made to know who are the players/teams who kill the bosses more often, also killing the bosses gives you a penalty for a total of five:
1. 10% chance that a creature teleports to you (cooldown: 10 seconds):
- In every hunting ground there is one dedicated monster that has this ability.
2. 0.5% chance that a new creature spawns near you if you hit another creature (cooldown: 30 seconds):
- In every hunting there is one dedicated monster that can spawn additionally.
3. Receive 15% increased damage.
4. 10% chance that a creature will fully heal itself instead of dying:
- Every monster in the new hunting grounds has this behaviour.
5. Loss of 10% of your current hit points and your mana every 10 seconds
Some of the info of the quest can be found in tibiawiki : https://tibia.fandom.com/wiki/Soul_War_Quest