Urza, Chief Artificer Everything about the text on Urza, Chief Artificer, one of Magic's best affinity commanders, screams artifact creatures, and thats the way to go
Agadeem's Awakening is also obviously very good in commander and Mono Black standard lists
There are currently 38 Commander-legal cards that create roles and seven different types of roles that can be created
TypeLegendary Planeswalker Liliana Collector Number94 Raritymythic ArtistYuzushio +1: Search your library for a Swamp card, reveal it, put it into your hand, then shuffle

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