I wanted to do this for a looong time (but somehow always forgot about it):
Now...ahem...(sports commentator voice) ladies and gentlemen now is the time for the first annual "101 creative deaths to inflict on Fern" contest!
Submit your "method" of choice, it can be anything, from putting him in a labyrinth with no exit to the old good "Boltons skin peeling", please don't forget to number every method you submit (and maybe state why you want him dead) afterwards the esteem jury of me, me and mini-me will choose the winner! The best method will be sent to Ame with a plea to end him in exactly the same way.
Disclaimer 1: winning this competition does not guarantee his death in exactly the same way or his death at all (to the regret of many).
Disclaimer 2: if there will not be enough participants or "creative methods" (which is probably what will happen) the contest will be suspended till better times.
Disclaimer 3: if you like Fern (i don't see how but it's an option) you (in your post) can state why exactly you like him, the "winner" will receive a Fern plushie which will call you scrub or loser every time you squeeze it (the product here mentioned is still in production and will be completed: never).