The second reason is to utilize all the typal support cards Magic has created over the years
The beauty of the card is in its flexibility, though: you can build in packages of artifacts, enchantments, or the like, and power them out with a well-timed Umori play, giving you a lot of options that a companion brew just wouldnt offer.
Shadow Puppeteers seems to be indeed a finisher, but it is quite a fragile card to cost 7 mana, even with its Ward 2
This adaptability is reflected in its abilities such as Overgrow, which increases the power of Grass-type moves when Treecko's health is low, adding a layer of tactical depth to its usage in battles
And tack on that most of the cards arent worth the cost of reholdering to the correct label
I mean, dont you want to constantly be able to ask Do you pay the 2?, I know I do