We will conduct this analysis as such: First, we will look at the strengths of the commanders in question, noting their archetypes and the impact that they already have on the format (without taking into account any unreleased cards besides these face commanders)
Blood Moon says, Nonbasic lands are Mountains, whereas Urborg, Tomb of Yawgmoth says: Each land is a Swamp in addition to its other land types. The key difference here is the words in addition to. If you dont see this wording, like on Blood Moon, then the type change will overwrite whatever types the card had before
The first two modes are always eligible to be chosen
Originally, hybrid cards (cards with hybrid mana costs) were the color of mana used to cast them, but that caused memory issues, so we simplified it by making them both colors
Crawling Chorus As youll see with more and more of these Phyrexia: All Will Be One cards, white has a serious swarm deck in the making