Fairly often, weve seen Prismatic Ending in two- or three-color decks, but a four-color deck can make Prismatic Ending answer nearly everything in Modern
Sanctifier of Souls 3W Creature Human Cleric 2/3 Whenever another creature enters the battlefield under your control, Sanctifier of Souls gets +1/+1 until end of turn
Theres some good long-game potential here: siege away with Unswerving Sloth, pump the team over the top with Veteran Beastrider and Daring Mechanic, or lean on your significant air force to whittle down their life points
Id actually prefer this to be Mana Confluence to help bring the cost of Pioneer down a bit, but Ill take what I can get
It gets a blocker or other annoying creature out of the picture and grants a potentially sizeable buff to Commander Damage
But one potential design space in a world of power creep is this one