Concerns over the mechanically unique cards showing up in a Secret Lair circulated quickly, especially with no way to acquire the cards other than buying them directly from Wizards of the Coast in the one week theyre for sale
However, the set highlights smaller creatures, such as frogs, lizard, squirrels, rats and mice, with cats only being given two creatures one being Ygra, Eater of AllYgra, Eater of All, a mythical Calamity Beast found in Valley lore
While Sprite can damage from the get go, Yolk begins with zero attack, and therefore needs a boost before it can begin to grow
It doesn't have defense penetration, but if you attack a defense monster, it will activate the effect of sending GY to him without taking a target, so as long as you are in Defense Position, you can penetrate almost all effects