Learning how to spot fake Pokemon cards starts with understanding common online marketplace red flags
Despite the misunderstanding on my part, I find Sisterhood of Karn to be a fun little creature that gets bigger the more spells you cast from exile
PSA 10 examples of 1st edition Poliwrath cards sell between $5,500-$8,000, while PSA 9s fetch $800 on average
These support many styles of deck building archetypes
A good control list will have dedicated parts of the deck tailored to efficiently deal with creatures thus allowing you to reserve your counterspells for things that you need them against such as Armageddon, planeswalkers, Mind Twist and so forth
Ill cover a few here to give you some inspiration, or just a solid place to start