I haven't been playing for years, but I'm assuming they haven't completely messed with the introduction stuff. There are usually themed 40 card decks with ever

I haven't been playing for years, but I'm assuming they haven't completely messed with the introduction stuff. There are usually themed 40 card decks with every set. They usually have two colors that are combined to achieve something. They come with little booklet that teaches how the deck is meant to work and maybe some lore behind the idea. My first deck was mono red Goblin deck, which had a lot of small goblin guys and the idea was just to dish out goblins faster than your enemy can handle them, a death by thousand cuts. As for themed decks power, they usually are not very powerful. Since they want to sell you more cards, but they are as good place as any to begin. Just don't expect to win tournaments with them.