And just in case, since protection is a tricky keyword: The bonuses that Sword of Fire and Ice provide do have synergy protection from a color not only protects against removal, but also lets you bypass blockers from that color
Omnipresent Impostor has the basic supertype, and you can play as many of them as you want in your Constructed decks
Wizards of the Coast has opened a proverbial Pandora's Box
If you discard dredge cards, you can draw two or them and mill a huge chunk of your library
Firstly, you have pioneer staples, such as Satyr Wayfinder or Grisly Salvage, to Pauper all-star Mulldrifter
Working on a rare/mythic only version I generally update it every 3-6 months, whenever I have time between work, life and other projects