Concept wise:
Extinction is barely a function of time, it is a function of life. Cockroaches, sharks, crocodiles, etc have been there for millions of years. Some species evolve and disappear in a short period of time where some simply refuses to do so ever. It is all about their habitat. Mutations, weather changes, geography, relations with other species etc.
Also, card AP is OP especially the unupped one with fractal. Perhaps if it loses -1/-1 each turn and start with 4 hp, will still be stronger than majority of cards.