Very cool concept! Love the static ability in particular, great reference.
I like the way the -3 interacts with the static ability, but I think the card does too little without setup. The floor seems a little low for the cost.
I think you could make the first ability a +1, and lower the base loyalty to 4. Minimally, on an empty board, you can keep +1-ing for card draw and potential planeswalkers in exile. And the other play patterns you've designed should still work!