A few minutes ago I played a match vs Priest as Death Knight. In that match the Priest used a Vampiric Touch stolen by Identity Theft and he got the extra 5 health plus the card draw. This must be a bug since Priest does not have the “corpses” resource, unless there is an intended interaction I’m missing. The screenshots I post below do not show the card draw but the deck tracker replay confirms it (turn 9).
https://imgur.com/a/hjERFlr
https://hsreplay.net/replay/h5oRwMMUnTtpujfRx8G3UL