It has an added bonus of gaining you Life Points if you negated a Monster effect this way, which in some cases can be well over 2000
To make the most of casualty, you'll want to fill your deck with creatures that reward you when they die, like Sinister Concierge, or tokens you have no attachment to, like decayed Zombie tokens
Further complicating matters is that each expansion is part of a series, which also has its own code
Actually, there's no ethical or acceptable reason to make "proxies" to pass the light test, bend test, and other well-known tests to weed out fake cards because there's no ethical or acceptable use of proxies that requires the proxy to be as similar to a real card as possiblea Sharpie on a basic Island does the job just as well and without any of the legal and moral issues
Listed prices are aspirations
Banish that monster