Valakut Exploration is sweet because you never lose the cards put into exile, and because it synergizes with our main con, adding more burn
King of the Oathbreakers King of the Oathbreakers is a commander thats difficult to remove, and itll continue to grow your army over time
Teferi, Time Raveler Locking people from casting things on other turns means they cannot cast more than one spell every go around, while you can use flash, instants, and stuff
It provides card draw and pumping from the command zone, and it has cute art
Each of these provides a great way to generate some sacrificial value towards Hearthull's damage dealing ability
But the people united to seize victory from the jaws of the beastmen, earning themselves temporary respite from a life-and-death struggle