A shadowy creature that feeds on magic.
That shadow was a creature known as a “mana wraith”. They drain the living’s connection to the weave of magic…if it was completely drained, neither of them would be alive. Some extra-planar force intervened tonight and kept it from taking it all too fast.
Mana wraiths are dark shadowy creatures that have come to the world of Aeralys from the Shadowfell and feed on magic. They are able to become completely invisible until they begin to feed. At that time they may become visible to those who can feel their presence. Often when they begin to feed, their victims fall into a comatose state, unable to defend themselves. Once they are drained of all magic, their life force gives out and they become mana wraiths themselves.