It creates a Mutagen token and because Quina, Qu Gourmet sees tokens being created, it adds an extra 1/1 Frog token too
If it's a Siege, it will still be exiled when the last defense counter is removed from it, and its controller may still cast it transformed without paying its mana cost
If it's an enchantment creature or legendary creature, instead put a +1/+1 counter on it and it gets +1/+1 until end of turn
That said, the deck felt like it had game in a lot of different matchups
Interaction Just because this deck loves to attack doesnt mean it ignores what your opponents are doing
Try to create a starting hand that has a one-cost, two-cost, three-cost, and four-cost character so you can play on curve