Ramunap Excavator
 
He's not branded as such, but this guy is the Magus of the Crucible, as in Crucible of Worlds from Mirrodin. For some of the cards in question, being remade as a Magus increased their appeal in one-on-one competitive play, as they can also attack or block regardless of their ability. Of course, that also makes them generally easier to get off the table, and that's relevant for a card like Ramunap Excavator whose ability leans towards combo such that your deck's plan could collapse if he leaves play suddenly. Of course, that also makes it even easier to, say, fish him out of your library using tools intrinsic to green, as opposed to touching blue for Fabricate or some such. And there's no reason you can't use both in Commander!
 
Constructed: 3/5
Casual: 4/5
Limited: 3/5
Multiplayer: 4/5
EDH/Commander: 4/5

It’s Crucible of Worlds! …on a creature.
 
Crucible has always been a popular, powerful effect; while this particular snek won’t completely replace Crucible, thanks to it asking for green mana in its casting cost, it does offer an alternate source of the effect without Crucible’s absurd price tag. Being a creature is a boon and a downside both: it’s more easily fetchable (by effects like Collected Company and Eldritch Evolution), but creature hate tends to be more common in decks when compared to artifact hate. And a 2/3 body with minimal protection is the easiest to hate out of most playable bodies.
 
Excavator shines best in conjunction with fetchlands and other ways to think your deck, but it can put in work if you just have ways to get lands to the graveyard. And with the Desert sub-theme of Hour of Devastation, it’s not too hard to use this to fuel massive Desert value engines.
 
Constructed: 3.75
Casual: 4
Limited: 3.25
Multiplayer: 4
Commander: 4