Get out there, play, learn, share, and absorb as much knowledge as you can that can help you compete
Giving your opponent a poison counter is a nice bit of upside, but three mana for an effect like this puts it behind the curve
Do I have to hide them on my person like the goblin in the card art
But if you put it in a deck it belongs to, youll quickly realize its much more powerful
So there, and if that way to counterplay a forced reveal isn't enough to deter players from using Hand Scope in their decks, think about the incredible assortment of Item Cards that are much more powerful than a quick reveal of the rivals' hand
Infinite Impermanence Outside of specific decks that employ traps at the forefront such as Phantom Knights, Eldlich, and Traptrix, every deck should have three copies of Infinite Impermanence eventually