When you rub a flumpf against a rakshasa, it creates a xag-ya & a xeg-yi...
The great flumph migration, the Float of the Flumphs, has begun, and as flumphs in their tens of thousands stream across the material planes, their presence is felt across countless worlds - whether by intermittently blocking the sunlight as they stream through the sky, or disturbing the rest of extreme insomniacs as they quietly chant prayers in passing. The PCs must hurry to divert the migration to less-populated worlds, lest billions of innocent sentients be mildly inconvenienced.
In the unlikely event that a flumph should survive their circuitous migration from Arcadia to Celestia, it will receive divine blessings, becoming a beacon of hope to all who dare to face impossible odds with absolutely no aptitude or preparation.