Think of them as a Stage 3 evolution they are played on top of fully evolved Pokemon, acting as an additional Stage and providing new moves with a stat boost, too
A Note on Dice Rolling and Statistics Cards that require you to roll a die use the traditional dice from D&D
They pass turn four having dropped to 12 life from your Ball Lightning, and then you go Bolt, Fireblast, Fireblast, sacrifice this Mogg Fanatic, take 12 to the face and die
This line gets more advanced than we're going to deal with for now, but the good news is that for the level you're at right now, in most cases the information you need is right here on the card as you work your way through a game of Magic
We'll see if if the hit rates remain consistent throughout the era as new sets are released
My current list plays a single Faba and no copies of Field Blower as a way of interacting with Tools