Take Poppet Stitcher, for example - a three-mana 2/3 that creates 2/2 Zombie tokens with decayed when you cast an instant or sorcery
You will see indestructible in most blocks, on a variety of cards
We would recommend unlocking each deck just to get a feel for them and add them all to your collection, but if you want to jump straight into battles with real opponents, focus on the Black & White: Basic Blue, Red and Green decks as they give you a bunch of handy trainer cards for building your own deck
Madison Li's effects use mana to cast, so as long as you have the energy counters to pay, you can use any of them depending on what you need for the gamestate
But if you look at the icon under the bottom-right of the art, youll notice that one of these versions of Remove Soul is from the 8th Edition of the game, and the other is from 9th Edition