pokemon card emolga RC23/RC25 Legendary Treasures Holo Ultra Rare Pokémon NM [2L] Electron Crush (60+) You may discard an Energy attached to this Pokemon Pokemon Black White Legendary Treasures

2: Target creature becomes a Treasure artifact with ", Sacrifice this artifact: Add one mana of any color" and loses all other card types and abilities

I havent looked at the cards with much of an eye toward other Eternal formats yet, but it seems like Lavinia, Azorius Renegade might make a splash there

A good example of this is the card Eiganjo, Seat of the Empire

It however is still considered to be in exile and not on the battlefield or your hand, meaning that there are much fewer ways for your opponent to be able to get rid of it before you can cast it

When we were designing them, we called them "double-sided cards," but were reminded by editing that all cards have two sides

In terms of the story, you are a Planeswalker