Remember that the quickest way to tell if a card is Shadowless (from the second printing of the Base Set) is to check the gold border, as the lack of a shadow will quickly indicate its status.
Many collectors damage cards because they use the wrong sleeves or storage products
It's likely the card name is Shiko and Narset, based on the mothership deck blurbs notes u/mweepinc
Once its destroyed, this turns into Leyline Surge, an enchantment that allows you to put a permanent from your hand onto the battlefield in each of your upkeeps
Richard was intrigued by the idea of something that felt like a board game, where there was a path that you would advance on over time
If a nontoken permanent that's a copy of Enduring Curiosity dies while it's a creature, it will return to the battlefield as an enchantment when its last ability resolves