Twenty-one total Lessons is all I could find that was even a little bit playable, and of those, several wouldn't be if you had to put them in the main deck
Pokemon cards I think are similar, we within the hobby know that other pokemon cards exist however, since its recognised by the wider audience for the reason of popularity its hard to argue the other fact
This Alakazam wont give you a one-hit knockout, but it can significantly weaken Pokemon before they even hit the Active Spot
Personally, if I want a specific card, i'll just grab it instead of buying and ripping boosters to get it
And not only that, he gives those creatures indestructible and haste, and when they deal combat damage to an opponent you draw a card
Its a lot of trouble for those who want to draw seven new cards