Thinking about it for an hour produced a decision (partly based on previous impressions, and partly solidifying and crystallizing those impressions) of green/blue, and I was off
A 6/7 body dodges most toughness-based removal, even a powered-up Candy Grapple, and shutting down 1/X and 2/X blockers is key, too
Boseiju, Who Endures If you knock at the door of the Green Assassins' Guild and ask them for help with your artifact or enchantment problem, you could hire Force of Vigor
If it has neither, create a Food token
This card gets even better when paired with the many other card draw effects in the Amethyst set
This deck has exactly five of those spells , which aren't enough to justify her existence