Just watched it on twitch and i think this skill is a bit lackluster. The Wraith is slow moving and seems to have no AoE. Not good for such a high point cost skill. Maybe I’m wrong and that just Grava didn’t bring out its full potential…
Grava isn’t known for his optimal play (we still love you, Grava) but I’m pretty sure on the test map that the spirit was using a red aoe effect. My guess was that it was vitality aoe.
I just noticed that when the Wraith teleported to a foe it (foe) already is rushing to the player and so the Wraith has no one to hit and looses its target. Maybe , again, it is just my impression and I might be wrong.