You can also annoy your opponents with Strip Mine plus Crucible of Worlds or Ramunap Excavator
It grows rapidly in this list and can just win a game all by itself Long Tusk Cub style
Hers is potentially one of the most powerful companions for a Doctor Matters deck, giving you card advantage just for playing the huge number of cards that are either a Doctor or have Doctors companion (this sets version of partner)
But hes kind of torn because during the course of the story, he finds that he has this mystical connection with monsters thats called bonding, and that means that you have this emotional, empathic connection with a monster
Todays newborn is either tomorrows hunter or tomorrows lunch
I would have ranked it higher, but being legendary (and not a creature, so dying a lot less often) really limits just how much we can exploit it