When playing a character with Heart Regen you can automatically heal damage. Heart Regen is a common ability. There are 2 characters and builds with it. Heart regeneration was added with wave 7 and is quite similar to 'Invulnerability'.
|E.T. all-rounder year 2||
E.T. World, Fix-it, Growth, and 6 more
|Marceline all-rounder year 2||
Acrobat, Adventure Time World, Cursed Red Objects, and 13 more
Use the Team Builder to put together a team with all the abilities you want.Go to the team builder now