This version of Megarock basically forgos all deckbuilding for big stacks of monsters. Mill deck hard, play Megarock, hit hard, that's it basically. Combine ReasoningGate with big rocks, bash stuff, hopefully don't brick! Sidedeck changes things up if needed with a focus more on Megarock Return and more ReasoningGate staples.
Not much else to say, it's a pretty simple deck.