Lumpy Space Princess is a Hero Card in Card Wars. It can be obtained as reward in Quest 21, or through the Algebraic Chest.
(3 Turns) Fully heal all of your Plains creatures.
Like Ghost Jake, this hero card only affects one type of creature (Blue Plains) meaning that if you level this hero up as your main hero it works very well in a specific type of deck but leaves no room for other types of decks in the future.
This should obviously only be used in a Blue Plains deck and should be played either on the 3rd or 4th turn so you have the chance to use this ability more then once and still use it on worthy creatures.
Overall she isn't the best hero for challenges in the game but will be useful for speeding through the game or in competitive multiplayer.