Wellwater
Just a flurry of H₂O
Fortunately the troll was already pretty much starved out on Derpibooru.
To make the troll healthy and happy, it need plenty of downvotes. At -50, the troll is cured and it’s free to roam the Everfree once again.
However, upvotes hurt the troll. At +100, the troll DIE.
Fluttershy tried her best to help the starving troll. Now, it’s up to you.