Xatu is the glue that makes the deck run smoothly, providing a little bit of extra draw and Energy acceleration, which is exactly what the deck needs
Deck Strategy
Persist Persist is close to being an all-timer reanimation spell at 2 mana, but the -1/-1 counter matters and targeting only non-legendaries severely limits the types of targets you'd want to bring back
The best two are Big Score and Unexpected Windfall since they are instants so you can cast them EOT, draw two, make two Treasures, untap drop a land you just drew and cast something huge
Anywhoos, We have good feelings that there is now enough card support and interested players to propel Kumena past in popularity fo at least Edric, Spymaster of Trest to eventually rival that of Ezuri, Claw of Progress.
They took the time to explain their method and look up current prices