Skithiryx the Blight Dragon might be a good inclusion, or perhaps Ria Ivor, Bane of Bladehold to support a more go wide approach
That said, these narrow cases are still highly restrictive
Set: The List Reprints Increase: +$19.03 Current Market Price: $23.56 Like The Master, Multiplied, Mirror Gallery makes it possible to copy Deadpool, Trading Card without having to sacrifice those copies, letting you steal all the text boxes you want
leveraging hyper-efficient interaction and card draw like Flare of Malice and Village Rites is one of the main reasons to play a sacrifice strategy
Normally you wouldnt be able to bring Ureni out until the seventh round of play, but various cards in the deck can help ramp up enough mana to get the job done early
I am not particularly thinking about Hammerskull paired with dinos and more thinking about it in decks that care about your power on the board