You'll control that permanent while considering Agent of Treachery's last ability
Later in the game, the impact of this card is reduced a bit, since just one mana probably won't make that big of a difference on turn fifteen or more, but the explosive early game it can provide is impossible to ignore
They are so good that I believe these will infiltrate many small and bulk transactions, where buyers purchase online or do not carefully check the authenticity of each card
Scrawling Crawler shines within this space as Underworld Dreams and Howling Mine compressed into a single card
For a classic 8-player draft, you need 24 packs
While Chilling Reign doesn't necessarily have as high value pulls as, say, Shining Fates, I think this is one of the most impressive expansions in a long time in terms of art direction