They can be identified by the SP logo, which is located at the bottom left corner of the artwork
Getting to cast an artifact creature for free tapped and attacking can be GAME ENDING
Thalia, Guardian of Thraben Thalia, Guardian of Thraben has been a staple for white creature decks ever since it was printed
This is the level of detail thats needed to create a codified power level, but the good news is once its done, its done
The places I would point you to in order to sell your Magic cards online and offline are eBay, TCGPlayer, Card Kingdom, Channel Fireball, Facebook, Craigslist, Local Game Stores, Card Shows/Conventions and finally Auction Houses
FAQs What is the best Vampire Commander in MTG