That definition isn't perfect, but it's closer than it might seem
Condition, grading scores, and historical scarcity dictate these market values, turning tiny pieces of cardboard into serious financial assets
Once made there is usually a mad panic to find a way of dealing with him, if that fails you then start to lose tempo and card advantage as well as being highly restricted in what plays you can make
If the chosen permanent is copying something else (for example, if the chosen permanent is another Copy Enchantment), then your Copy Enchantment enters the battlefield as whatever the chosen permanent copied
When things go right, this can snowball beautifully, but it also heavily relies on the top deck gods to bless you on your first draw of the turn