tax cards mtg ETCHED FOIL Land from Commander Masters Magic the Gathering Proxy Esper Sentinel Land Tax [Wilds of Eldraine:
Description
Your library stops being a creature, so it leaves the battlefield and goes back to being a normal library

If you would like some guidance on casual house rules that may provide a better player experience you can read my article about casual playgroup rules.

We have a pretty bare-bones concept

In fact, if you were to employ this strategy at the Pro Tour, so long as you did a good job drafting, building your deck, and playing the games, you'd have a perfectly fine chance to do well

Observing how others approach custom magic can lead you to adapt techniques for your own projects