Speaking of Black Kyurem, worth mentioning the art too, it may not be up to the level of most of this thread, but as someone who loves Zekrom but usually hates Black Kyurem, my first reaction towards it was that it's very cool
Exhaust means you can only do it once per game, but blinking Loot, turning it into soup with Agatha's Soul Cauldron, or recasting him solves this problem
Once its in the discard pile, a simple VS Seeker can allow you to bring it back when you need 20 damage to Knock Out a Pokemon or when you need to refresh your hand up to 5 cards
Does it star in some kind of legends deck
In the past few years, the trading card market has exploded and everything from baseball cards to trading cards are selling like wildfire through online marketplaces like eBay