Rip the Ninja Kitten in half
It gains "At the beginning of your upkeep, if this card is exiled, remove a hone counter from it" and "When the last hone counter is removed from this card, if it's exiled, you may cast it
But when you run small stuff, you often run into removal either mass or targeted, like opponents' Wrath of God or Cyclonic Rift
Drakuseth, Maw of Flames feels right for the deck and Elesh Norn, Grand Cenobite can help clear out pesky small creatures (and help avoid some of the combos based around them from popping up)
This is especially true because Pokmon Sun and Moon and Pokmon Sword and Shield sets are beginning to phase out in preparation for the release of the Gen 9 games Pokmon Scarlet and Violet
Surviving one more combat phase means you get one more draw step it could be the Supreme Verdict that you need to stay in the game