The loser reports to a Waffle House and serves 24 consecutive hours inside, with one hour removed for every waffle eaten. It sounds like an eating problem but becomes a time problem around waffle five. The undisputed king of fantasy punishments and the one that made the genre go viral.
Heavy sentence
Severity 4 punishments are the ones people talk about for years, which is exactly why they need full league buy-in before week one. Put it in the constitution, set the deadline, and agree on proof requirements up front.