If you have a Saga thats particularly powerful, and you dont want it to go away - for example, Wilds of Eldraines Three Blind Mice , you can keep it hovering between that second and third chapter, to keep making tokens of powerful creatures
The highlight card, Chord of Calling, only goes for about $5
Maybe the designers decided that they could only accurately reflect these characters by spreading them out across the color pie, or they felt some obligation to get green in on the action somewhere
In other TCG-related news, check out Terminal World 3
While it will be attactive to run him in the command zone, he will also be right at home in countless aristocrats and tokens builds, especially those with Commanders and gameplans that involve sacrificing many creatures per turn
The deck has plenty of ways to make unique artifacts with ease