Combo decks in cube always suffer compared to constructed versions of the decks to consistency issues
If there's a cost associated with having it attack, you're not forced to pay that cost, so it doesn't have to attack in that case either
At approximately 1 per case (1 per 6 boxes, or roughly 1 per 144288 packs), SP cards are significantly harder to pull than Secret Rares
The deck also plays a number of powerful and efficient removal spells including Anoint with Affliction and Crypt Rats, Card draw with Feed the Infection, and features a powerful Ninjutsu sub-theme with Nashi and Nezumi Prowler allowing your small, unblocked creatures to effectively generate tons of value
Knowing that Pidgeot ex's Quick Search ability can only be used once each turn, even if you have multiple copies in play, will help you plan out your turns more efficiently so you're not accidentally breaking any rules or cutting yourself off from different lines of play