This is pretty good to go, Idaho
Once it enters the battlefield, it is no longer a creature and is just a planeswalker
Im putting an emphasis on adding planeswalkers since this deck looks like it benefits from a long, grindy game, and some planeswalkers work very well in the context of a token-sacrifice strategy
While it offers utility in dealing with specific threats, there are potentially better options such as Reclamation Sage or Knight of Autumn that provide additional flexibility or value
Lets look at each potential commander released through the Duskmourn main set and the Duskmourn Commander precons and rank them based on how much they fit into this new world and the new strategies they could enable
There is a theoretical rejiggering of brackets where you could tell me this is acceptable, but I wouldn't expect it, and certainly not with the brackets as they are now