Conclusion I do want to basically sidestep the argument over whether or not all planeswalkers should be commanders: Myth Realized is doing a good job getting into what the format could be like with them involved
It's more of a card that might be salt-inducing if you must watch the infinite extra turns
Another crucial aspect is durability
Agatha of the Vile Cauldron Biomancer's Familiar Bladegraft Aspirant Blossoming Tortoise Convergence of Dominion Embalmer's Tools Forensic Gadgeteer Heartstone Lavinia of the Tenth Mutagen Man, Living Ooze Power Artifact Sam, Loyal Attendant The Dining Car Training Grounds Zirda, the Dawnwaker
8 Sorrow's Path Is Terrible But Also Wonderfully Weird First Printing: The Dark Sorrow's Path has the distinction of being one of Magic 's very worst cards
This Magic deck also rewards the player for attacking and may even get extra combat steps, usually with red mana, so Kaalia can trigger more than once in a given turn