Create a token thats a copy of one of those creatures, except its power is equal to the total power of those creatures, its toughness is equal to the total toughness of those creatures, and its a colorless Eldrazi creature
Jeskai mill, anyone
Because this deck has such a wonky curve thanks to all of the fatties, I suggest playing cards like Sensei's Divining Top, Mirri's Guile, Sylvan Library, and Scroll Rack to control not only what you draw but also what stays on top of your deck (which I guess is the same thing but it's important with Mayael!)
Rielle, the Everwise can immediately reload your hand while raising her power, and Korvold can turn all of your sacrificed lands into +1/+1 counters and cards
Cascade was one of the most busted keyword abilities ever created in Magic history, and Dinosaurs even feature a card with that text (Annoyed Altisaur)