Features: /sethearts [player] [amount]: permisson: lifesteal.sethearts give any player any amount of hearts!
/withdrawhearts [amount]: permission: anyone get your hearts as an item (if you have a dupe server i suggest that you make it so you cant dupe hearts)
/checkhearts permisson: lifesteal.checkhearts see how many hearts a player has
if you have any questions, errors, suggestions feel free to leave them in the comments as i am new to skript (you can add me on discord but please say that you came from here as its very confusing: rxse0)