This is probably just an example of "digging into the internals of Windows" like you mentioned, but here's my process for creating UWP MagicWords:
Create a MagicWord where the Filename is 'explorer.exe' and the Parameter contains the following:
Determine what the variable [TARGET] should be replaced with by doing the following:
1. In SlickRun (or the Windows Run dialog box) open: shell:appsfolder
2. Find the app you are interested in, right-click on it & create a shortcut.
3. Look at the properties of the shortcut and replace [TARGET] with the entire contents from the Target field in the shortcut properties.