Satsuki is only two colors, which is limiting in both the positive sense that you avoid decision paralysis and the negative, less flexible sense
Oh, and did I mention Caldera Hellion, Crater Hellion, and Ryusei, the Falling Star not only benefit from damage doubling, but they also play nicely with Blink / Bounce / Sacrifice themes outlined earlier
This was because white is the best color at making volumes of creature tokens, as it creates a lot of small 1/1 tokens, playing up its flavor as the army color that beats you down with a large number of small creatures
Acrobatic Maneuver
Strictly speaking, he might be better as part of a Green-Black build as part of the deck itself, but well go down the Fynn rabbit hole anyway
Giant Growth adds a +3/+3 to the target creature until the end of the turn