Shriveled MAX UP Heart
From the Super Mario Wiki, the Mario encyclopedia
The Shriveled MAX UP Heart is an item in Paper Mario: The Origami King. It is located in Scorching Sandpaper Desert, and was shriveled up by the sun. Professor Toad can dig it up from a spot in the middle of a circle of rocks. The Shriveled MAX UP Heart can then be brought to the spring in Whispering Woods, restoring it to a MAX UP Heart that increases Mario's maximum HP by five.