A short time ago, @CelticCoco posted another of her excellent tutorial videos:
KRITA ANIMATION : Create Motion Graphics: a step by step tutorial (Includes a Challenge)
Here is my response to the challenge, not fully in compliance with the ‘rules’ but nevermind:
As you can probably guess, it uses animated transform masks (big scary ones) and animated transparency masks (little easy ones).
If you’re new to krita (and even if not) it’s worth watching her video tutorial series here:
Blade & Quill - YouTube
I suggest that you watch them (especially the krita ones) in date order because they do progress up through the knowledge and skill levels.