You can just feel the Dungeons & Dragons influence here, which Garfield does credit (Wizards of the Coast would later acquire the brand)
Izzet Lessons and Arclight Phoenix decks jump out as archetypes that reliably fill the graveyard and can adopt this
With cards like Drover of the Mighty, Channeler Initiate, Pillar of Origins, Unclaimed Territory, and Attune to Aether in Standard, it's not hard to get the mana you need to play the best Dinosaurs from each color
Some people just want to play this beast mutant for the value it brings, but there are others that want to use it as the latest way to cheat out Phyrexian Dreadnought or something like that
There might be a way to mash Persist Combo together with Cat Oven, giving the deck a legit backup plan for winning without the combo
Whenever a land enters the battlefield under an opponent's control, if they control more lands than you, you can put a land card from your hand into play