Check the card back first genuine cards have a deep blue gradient in the Poke Ball area, while fakes use a lighter, flatter shade
A rather rare Goblin kindred card that has seen scarce reprints since it debuted in 1997s Visions expansion, only being included in compilation sets such as Sixth Edition and Anthologies as well as the recent Mystery Booster 2
Sure, the deck has weaknesses: cheap creature removal cards like Go For The Throat, bad opening hands, or simply just not getting enough land
Whenever you cast a creature spell, that creature enters with X additional +1/+1 counters on it, where X is the number of colors of mana spent to cast it
Be careful you get all the information correct when writing your card listings, be realistic about your cards' quality, and obviously don't try to mislead or trick people