mtg karn cards Liberated (FOIL Showcase) - Proxy 2XM You may choose an artifact card you own from outside the game or in exile Karn - MTG Wiki

Extravagant Replication Playing Extravagant Replication comes with a big risk: This blue enchantment does nothing the turn you play it, so an opponent with a Reclamation Sage or Destroy Evil waiting in the wings might devastate you

Yes, you can exile an indestructible permanent, be it a creature, artifact, enchantment, or land

It makes other Sphinxes cheaper and provides a mini fact-or-fiction whenever we land another one

I also like this with Black tappers like Ghoulcaller Gisa since you can tap and give them undying right before they die to destruction removal like Murder and Wrath of God

Lot of very strong buy prices in my opinion

While Nahiri has appeared on five different Planeswalker cards (finding the most success with Nahiri, the Harbinger), she was widely believed to be depicted on the incredibly powerful Stoneforge Mystic