|Finn has three magic nails left.|
|Introduced in||"His Hero"|
Finn is shown to have at least five Magic Nails in "His Hero." He uses two of them. One to fix a shoe's heel and one to "fix" Lumpy Space Princess' body. Magic Nails may have the effect of performing their user's will as well as weaponizing whatever they are used on. The Magic Nails were used in an attempt to help people non-violently by making them capable of defending themselves, so Finn apparently knew that they turned whatever they were used on into weapons. It is unclear how he managed to use a Magic Nail on Lumpy Space Princess.