Learn Polish: Odrzucamy stary schemat, bo chcemy stworzyć coś nieszablonowego. - We reject the old pattern because we want to create something unconventional.

This is the Partitive Genitive. When you modify an indefinite pronoun like coś (something), nic (nothing), or cokolwiek (anything) with an adjective, that adjective must be in the neuter singular Genitive form. Even though coś acts as the direct object of the verb stworzyć, its modifying adjective takes the -ego ending.

What is the root of the word nieszablonowego?

It comes from the noun szablon, which means a template or a stencil. By adding the prefix nie- (meaning un- or non-) and the adjective suffix, you get nieszablonowy, which literally means 'not from a template', and translates as unconventional or original.

Why do we use the imperfective verb odrzucamy but the perfective verb stworzyć?

Odrzucamy (we reject) describes a general stance, a present attitude, or an ongoing process. On the other hand, stworzyć (to create) is perfective because the speakers want to achieve the specific, completed result of having created this new thing, rather than just focusing on the process of making it.

Why does stary schemat look like it is in the Nominative case if it is the direct object being rejected?