If your opponent mills your entire deck, you usually have until your next draw step to solve that problem somehow, whether that means winning the game yourself or finding a way to put cards back into your library
So even though this effect does have valid targets, it's a bit weird to think about how they actually behave with this card as one of them has a mechanic that actively cheats the effect to make it a proper target, and the other is an incredibly rare prize card
The Card Centering Tool for Buying, Grading and Selling
This will no doubt be one of the most highly sought-after cards in the entire set
You can get Flairs for four-diamond cards with the use of duplicate cards and some Shinedust
Mass [mtg_card]Banishing Light[/mtg_card] might make you shrug when you read it, but in actual games it will generate interesting tensions