This isn't LEGO. Nor is it an official League of Legends product. But Chinese toy companies Decool and Bozhi care not for international copyright laws.
Normally known for their low-price, high-quality knockoffs of actual LEGO products, these offerings from the two companies areactually made up of original designs. Or, well, original in terms of LEGO products.
There are two sets of League of Legends minifigs (one set from each company), comprised of 14 figures in total, and they look pretty good! Better than nothing, at least, which is what you'd otherwise be getting since there's no such thing as actual League of Legends LEGO.