Snakebite

Jorbs

The numbers aren't incredible on Snakebite, but it's surprisingly capable of taking down some Act 1 and 2 fights. Play it on a turn where you aren't being attacked and have spare energy, and it'll deal 20+ damage in those fights for 2 energy quite often. Playing around with a Retain card is a good way to get a sense of how powerful getting to play your cards on the best turns to play them on can be, and will help you understand why something like Well Laid Plans is so strong.