Disclaimer: I will not focus on Art or grammar, unless the latter would make the deck too difficult to understand.

Ah yes, Lovecraftian horrors beyond mere human comprehension with Miss Locket.

This deck is actually pretty damn neat in the concept. The {Lock} is actually rather clever mechanic, and I like to imagine the card animations in-universe looking quite imposing and expansive. When doing Lovecraftian stuff, going full throttle is a good idea. And the mechanics involved really help that feeling of inevitable madness that you need to stave off at any cost.

For some criticism, though, there's a bit of a catch-22 going on. On one hand, this deck could do with more {Unlock} options. As far as I can see, you just have single Simple Card Move for 1 {Unlock}, and it takes 6 of those with one of the Power Card Moves to unlock another method. However, if giving more {Unlock} options, Yog-Shothoth's burn would become too much, in my honest opinion, and it would need proper rework to work with that?

Still, good job!

Great theming and mechanics!