Free sacrifice effects are great with any Commander that has payoffs for sacrificing stuff like Juri, Master of the Revue or Korvold
However, it has the inherent strength to expand its advantage at an accelerating rate by incorporating extra turns, so if you can manage the early game well, you'll have plenty of chances
Petrahydrox's ability resolves before the spell or ability that caused it to trigger
Demonic Tutor and Natural Order provide the singleton format with a touch too much consistency
For three mana and a Phyrexian Blue, this Therosian God can be transformed into Heliod, the Warped Eclipse
My Results So Far Treating the entire operation as almost a business from the get-go, despite the aura of nostalgia that got me back in it, helped me stay in the black where others might have struggled