These decks are often composed of cheap creatures and burn or pump spells to push damage
Im looking at cards like Otharri, Suns' Glory, Etali, Primal Storm, and Brutal Hordechief for additional triggers from additional combat phases
Squirreled Away has enough card draw that you can use Hazel's mana ability to simply out-cast your opponents, but it's still a shame that we couldn't fit a big X-mana spell into the budget upgrades
Cleaver Skaab can make two copies of the sacrificed Zombie, and the Demon creature Eater of Hope can devour friendly creatures to either regenerate itself, or kill enemy creatures
Donquixote Family (Sugar): Building Sugar (R/P) requires balancing Donquixote Pirates characters and lots of event cards
The cherry on top is you can also use Felothar's ability to sacrifice the tree and draw dozens of cards