I've been thinking maybe Rafaam isn't that bad of a card, you get to choose depending on game state what card to get, it can be pretty good. I feel it could work in Reno paladin maybe.
giving +10/+10 to a token to end the game potentially. seems possible for paladin.
filling your board with 3/3s can be very good too if it's some late game stalemate.
dealing 10 random damage is the worst one, but still in some situations, like against freeze mage is like a pyroblast, all of it goes face. Again paladin can control the board well and clear the other side for this to hit face. As a board clear overall it's ok too but you don't really want that. you don't play a 9 drop to get a mediocre 10 mana board clear.
Now compared with Ysera, stats are worse, cards are worse too but there is no RNG. From Ysera, you generally want Ysera awakens for burst and board clear, nightmare and dream can be handy too, emerald drake is ok to fill the board and laughing sister is just bad mostly. So you might play Ysera and get a useless card for 9 mana or play this card and get something you know it can win the game next turn potentially, I think it can be playable. maybe in control warrior even, Building a 3/3 board for CW seems really good against paladin too, no?