In other words, your opponent will know the targets of your original spell and your copy when choosing the new targets, if any, for their copy
Somewhat expensive on its own, for six mana youre going to want to be turning a good number of small tokens into much bigger flying ones to get your return on investment here, especially considering that in most situations youre going to need to wait a full turn cycle before you can swing with your new flying death squad
However, mixing it with Tear , which can destroy an enchantment at instant speed, makes this card a staple in many sideboards as it can deal with a lot of threats
Then, if your deck met certain deck-construction requirements, you could cast it from outside the game
If you want to be technical, it's a Bracket 3 deck with one Game Changer (Demonic Tutor)
A few years later the Paris mulligan took its place, and then the Vancouver mulligan most of us know today