Very well done. Mend is an attack on Regirock ex, of EX: Emerald, I believe.
Everything looks good. Vengeance is spelled incorrectly. Other than that, your wording is perfect. Excellent card.
And art does not make a person a great faker. Good art makes them a good artist, and note how he properly gives credit to the actual artist - he himself did not draw that Golem.