Thresh Ability (LoL): Damnation
Damnation Thresh
Passive
A soul will only drop if the enemy unit dies within 1900 range of Thresh. Souls are visible to allies, and only become visible to enemies if the enemy team has vision of Thresh. Souls disappear if not picked up after 8 seconds.
http://na.leagueoflegends.com/board/showthread.php?p=33266720#33266720
How much armor and spell damage anyone know?
The armor and AP gained from souls start at 1 per soul, but decreases by 0.01 armor+AP pr soul for each soul collected. Meaning the first soul gives 1 armor and AP, the second gives 0.99 armor+AP, the third gives 0.98 and so forth until you hit 0.5 armor+AP pr soul, where it stops decreasing.