Another question - how does Erebus' conversion ability work (to create nighwalker minions) ?
(1) Does the conversion ability only work on enemy creeps which are killed (or can nightwalker be created from friendly creeps killed by the enemies also) ?
(2) Does the conversion ability work only when Erebus is in the vincinity ? For example, if Erebus already has some nightwalker minions. Erebus sends the minions to lane 2, while Erebus stays in lane 1. If the minions kill creeps in lane 2, do those killed creeps have a chance to convert into nightwalkers, even if Erebus isn't in the vincinity ?
I guess I'm a bit confused about Erebus' conversion mechanics, having played Oak previously (his spirits minions are created in the vincinity of the spirit wards, even if Oak isn't around the wards).