When Shadowform is cast as a Priest, the Hero Ability changes its name from "Lesser Heal" to "Mind Spike" and does 2 damage or "Mind Shatter" doing 3 damage (depending on how often you cast Shadowform) instead of healing for 2. The icon also changes from a hand held upwards with dominant yellow and orange tones into a hand held towards the player with a bright spot in the center and dominant purple and black tones.
What happens to your Hero Power if you cast Shadowform as a non-Priest? According to the card's text, it also deals 2/3 damage, without anything else specified. So does its name and icon change to the same as the Priest's variant or is there a different name and icon for each class?
Oh, and before anyone asks: Lorewalker Cho.