I’m assuming you’re asking for a quick summary
Thief of Space is someone who takes the physics, science, literal space and technology from others to utilize for themself. They’re capable of stopping you in your tracks or speeding themselves up to blurring speeds. They’re generally characters interested in any of the sciences, good challenges for them would be slowing the fuck down, them trying to build things on their own and failing (all they’re GOOD at is stealing), and things of that nature
Page of Void has already been done
Thief of Space land types would be something of the nature of creation, they’d have the Frogs already, however they’d also have events or situations where they need to slow down. Perhaps they’ll also have things floating around, so they may steal the inertia from them.
Page of Void land types would be along the lines of cluttered, busy schedules, consorts having no time to help the page, and people focused on themselves. Information that shouldn’t be widely known is just splayed out for all to see, ‘secret’ passages aren’t really secret, and puzzles are non-existent.