Once you get this flipped, getting convoke on all of your noncreature spells is sweet, as is untapping four creatures on your end step
Kefka plays a very controlling game plan, stopping your opponents before they can do anything
The first is a triggered ability: "When this permanent enters, target player may search their library for a card named Mothers Yamazaki, reveal it, put it into their hand, then shuffle." The second and third abilities represented by Mothers Yamazaki's "partner with itself" keyword modify the rules for deck construction in the Commander variant and have no function outside of that variant
It is apparently a Commander deck based on the same themes found in Modern Urzatron builds
As such, I just kill an opposing Thief of Sanity and move on with my life, and it has rarely done anything bad when I play against it
Being castable from hand through a Grafdiggers Cage, for example, was a major problem