Back in Innistrad block, we had Delver of Secrets, Huntmaster of the Fells, and Garruk Relentless, while Shadows over Innistrad gave us Archangel Avacyn, Thing in the Ice, and Westvale Abbey
As an added bonus, it'll burn when you sacrifice tokens as well
Its especially strong against sticky value threats like Wurmcoil Engine and Solemn Simulacrum, since your opponent takes a pretty big tempo loss if those dont hit the graveyard
The main downside to the Roaring Heat is the mix of fire and fighting energy, but when looking at the card composition and the cards available for countering this issue is higher compared to lacking energy
I also think cards like the Dominus cycle will double as great cards for the 99 if you decide not to make them into a commander