Where do you learn the last spell on Lego Harry Potter?

You're likely thinking of the "Expelliarmus" spell, which is not the last spell learned in Lego Harry Potter games. It's actually one of the first spells you learn!

Where to Learn Expelliarmus in Lego Harry Potter:

* Lego Harry Potter: Years 1-4: You learn it early in the game, in the first year.

* Lego Harry Potter: Years 5-7: You also learn it early in the game, during the fifth year.

While Expelliarmus is a very important spell in the Harry Potter books and films, it's not the final spell learned in the Lego games. The games generally focus on teaching spells essential to the story and gameplay, so the "last" spell can vary depending on the specific game and the level you reach.

If you're looking for a specific spell and need help finding it, please tell me which Lego Harry Potter game you're playing, and I can give you more precise instructions!