So we do know that the source of Fel magic is the Twisting Nether and that it came to existence by the Light and Void clashing on each other in cosmic scale. We also know that it's (exclusively?) sacrificial magic that uses life as fuel. So: ...
1) Does Fel magic even work without something dying? or even the weakest of cantrips require some sacrifice?
2)would Fel magic work on undead or constructs if no other life source is available?
3)do playable warlocks use exclusively Fel magic or only the spells that cost soul shards are actually Fel? (with the rest being arcane i assume? or even shadow?)
4)can the Fel produce any type of effect? for example the affliction spells are awfully close to the Void's domain, while the various portals/conjurations to arcane
5) why are demons seen so frequently using shadow magic? is it shadow bound by fel or actual void?
thanks for any response!