Itll give you two mana for sacrificing a creature, which, if youre making tokens, turns this into something akin to Ancient Tomb every turn
It doesnt make quite as many Foods as Rocco, Street Chef, but Gyome does makes a ton
I don't know if this format, the previous Ravnica-Kamigawa, Ravnica-Time Spiral, Khans of Tarkir , or the recent Ravnica Allegiance Standard right before everything failed horribly is the best of all time, but the only other format that is even in contention in my mind is the one right at the start here: pre- 8th Edition Onslaught-Odyssey
You may choose a Cave you just put onto the battlefield with the first mode, if applicable
Once the game starts, language matters a lot less
Another good EDH example is Isshin, Two Heavens as One, and in this case, youll want as many good attack triggers as possible