Whirlwind

Jorbs

Whirlwind is very breakable with certain relics and enchantments. Put Vigor 8 on this and draw it off Offering and most fights in the game will already be won or close to it. I think it's probably worth picking up in Act 1, especially if you're going to some events, for the chance of it becoming very strong very quickly, but you'll definitely also have runs where you never find a way to make it much better, in which case it's not a great card. Often worth upgrading if it's worth taking at all.