Capable of attacking and blocking, many creatures primarily act in combat and are often a deck's primary source of dealing damage
It's also a great way to find Lana's Aid TWM 155, for when you need it
I learned a lot about it by reading Jesse Mason, a self-titled game design critic who wrote comprehensive reviews of sets from other TCGs from a holistic perspective: looking at the themes and inspirations behind each set (or, to be more accurate, each block of sets), it's aesthetic, how the cards played both in Constructed and Limited (drafts are an important part of other games, unlike Pokmon), etc
collectors wanted new cards, not reprints, and Team Rocket arrived two months later anyway
So Im hoping I just made someones day a whole lot brighter