There are times when I want to run Goblin Bombardment or other sacrificial or "Do something with a dork" but they require a certain threshold of creatures in your deck to function
It places the maximum number of things that can be restocked, so you dont have to worry about quantity
With Yuriko, the Tiger's Shadow , your whole deal is striking with low-cost, evasive creatures, then launching your commander into play with ninjitsu, and reaping the rewards: plenty of card draw, and plenty of pain
There are other ways to play with the Power 9, though Alternative: Use Proxies Instead If you're playing in a sanctioned Vintage or Old School tournament, don't do this
My first thought is how insane this version of Kefnet is with draw spells