I play Rule of Law effects in most of my mono-white decks, so this card is a real boon in my creature-heavy decks
The same user also notes that the card was only given to close friends and certain Wizards of the Coast employees so it was never in general circulation
If we tried to play the original Copy Enchantment itself as a copy of an Aura, Dual Nature doesn't trigger at all--Opalescence specifically does not animate Auras, which is good because an Aura creature is automatically dead by rule
In addition to serving as protection for your own lost treasures, it also combines very well with cards like Top and Urzas Blueprints to yield extra cards
The criminal aspects of the card are light, though, simply determining how many cards you get to keep with his +1 ability
Theres at least one of each basic to fetch with Fabled Passage, Ash Barrens, and Prismatic Vista