Envenom is a weird card. If you're hitting lots of times with attacks, why do you need to apply Poison? If you're applying lots of Poison, why do you need to hit lots of times with attacks? When it makes it into my decks, it's usually because I have a deck built around Shivs for damage which hasn't found a sensible way to scale up damage to win boss fights yet. In a deck like that, I might take an Envenom shortly before the boss fight.
