Krawlers have great recursive tools. But in this deck, we're looking to use those tools to also flip needle worm multiple times. When facing a standard 40-card decks, needle worm effectively deals 1/7 of the remaining . Chain enough of those together for a fun deckout win.
Backup plan, crash through with Link Krawlers.
Moon mirror shield is an unsung hero here. It brings itself back and makes all of your low-attack Krawlers much much harder to destroy the ways they normally would be.