You will still need to pay the individual casting cost for each Commander, and Commander damage done to other players is tracked per card , not as a total
In addition to these abilities, the card can also be Cycled to draw cards, allowing them to enter the graveyard and then buff your other Artificers (many of which are likely to be Cids, if youre playing your cards right)
It's not that we can't make use of it, but we wouldn't do so in as high of an as-fan as Alara Reborn did
Factor in any other creatures that come down (like a Seasoned Dungeoneer that progresses the room on Turn 2) and it's easy to see why this mechanic is so insane
The cards given the treatment are incredible, full of staples like Doubling Season, Exploration, Atraxa Praetors' Voice, Blood Moon, and Toxic Deluge, and the art is varied but mostly fantastic
Of the cards that we designed during this phase, none are exactly what's printed, but a few came close