Talk:Thresh/@comment-85.176.35.223-20130108222415/@comment-2248060-20130108223550

1. theres a bout a 1000 unit radius (I think but its a rough estimate) in which if a unit dies a soul may spawn, champions and large minons (seige/super minions) as well as large monsters (Barron, blue, red, big wolf/wraith/golem) will drop a soul, the units listed will ALWAYS drop sould,  small minions and monsters have a chance to drop them

2. straight from the ability details

he first soul will grant 1 bonus ability power, armor and magic resist. Subsequent souls will grant 0.01 less, down to a minimum of 0.5 per stack. This will stack indefinitely.

theres a chart further down the page that shows this but I will post a portion of it here