This played after justicar will allow you to hit the opponent for 4 a turn. If you want a an alternative win conditions , you could abuse the inspire mechanicsbwith this to drainnthe other played in a few turns.
Tournament medic, Garrison commander, justicar true heart, etc....it opens up so many new deck styles . people need to get their head out of their ass with the current meta. Look for new deck options, not just trying to fit these cards into existing decks
The advantage of "Priests can heal themselves to undo the self damage!" is completely moot when you really shouldn't be spending mana healing yourself in these kinds of decks. Same goes to Shadowbomber.