A couple of comments:
Valojinn is an absolute beast of a card and pretty much mandatory in any competitive Dread deck. The card becomes especially devastating if you play other cards on it, like Soul Breather or Spirit Storm OR you manage to pull it multiple times from the void, for example with Omenbinder or Of Two Minds, Path of Death, etc
Ulrika OTK decks are very common in Mythic and it's probably a bit overturned, although all the cards are locked now. Best counter is to build a wide board and be fast.