I think the effect might be too slow. Also to get value, you would need high cost deathrattle, which seems contradictory if you want to play the priest quest. (However, it is still worth it if you are playing quest priest to have this card). I think with Obsidian Statue and Deathwing, Dragonlord, this card should see some play. Hopefully there are good high cost deathrattle cards to compliment this even better.