25.27Level 11 — chromatic mediant

Try:

Cm → E♭ major

or:

Cm → A♭ major

or even more surprising major-third relationships later.

But keep one common tone if possible.

For example:

Cm: C E♭ G

A♭: A♭ C E♭.

Common tones:

C E♭.

That makes the shift smooth.