Some as examples, in addition to the ones mentioned above: Pidgey line, Poliwag line, Machop line, Dratini line, Abra line, Krabby line, Koffing line, etc
It provides the ability to grind out when you run out of cards, almost giving you an extra card draw each turn, but better, as it's a permanent of your choice from your graveyard, nulling any efforts by your opponent when using removal spells
If you find you won't use features like lounge access or the status-boosting benefits, you may want to grab a card with a smaller annual fee
That is why Im such a huge advocate for the Solrock and Lunatone engine in this build
Note they must lose life unless they can discard
But prowess took a strategy that had some issues with combat and simply gave it a concise, effective way of mixing up non-creature spells and combat