Pioneer In Pioneer Im inclined to play more colors and take advantage of Stitchers Supplier and Satyr Wayfinder with Uro, Titan of Natures Wrath as a core set of one-, two-, and three-mana creatures
With this logic in mind, this is how you are going to start picking your cards
This list runs a singleton Gifts Ungiven, but I've seen people often run two or three copies
The other text on their cards isnt particularly relevant, though Deranged Assistants mill and Sea Scryers color fixing can be helpful on rare occasions, so dont discount it entirely
Weve seen Commanders like this before, and in the case of Ob Nixilis, Captive Kingpin, they tend to overly focus on their combo potential
Grafdigger's Cage was arguably the first of this style, preventing creatures from entering the battlefield from your graveyard as well as your library, nor could you cast spells from the graveyard