These will not be legal in formats like Modern, Standard and Pioneer
Each Collector Booster contains the following
Giving an infect creature a sudden boost in power or evasion can end a game on the spot
Charmander, Bulbasaur, and Squirtle have fallen to the $30-$40 range from the $40-$50 range they held at their peaks, and Totodile (the next most valuable card in the collection) has seen its price cut in half in the past month
Wizards has shown that they can make a tribal deck alongside themes like Mutate and Cycling, so we could definitely see it for this underserved, but deserving creature type
Having the discard be creature or planeswalker-specific isnt ideal, although it ties into the graveyard-robbing theme of the third chapter