Viper is a MARVEL SNAP card that costs 3 energy and has 4 power. It has the effect: "On Reveal: One of your other cards here with the lowest Power switches sides."
It has variants that are part of the Chibi, Secret Wars, Steampunk, Venomized, Noir, Post Apocalyptic, Pixel, Fantasy and He Tianyou categories.
Viper has synergy with The Hood, Green Goblin, Debrii, Black Bolt and Moon Knight.