The rule has always been so simple, good deities will be reincarnated and will be awakened to fulfill their duties. The wicked ones will be locked in the underworld for eternity. But because the Town of Heathens has lost its culture and worshippers, the protection has been weakened and the Trickster God managed to escape, the evilest of them all.
How is that a problem, you asked? Well he just possessed a dead man's body and shamelessly walked the town naked on his first day. To make things worse, he now just ruined a sacred wedding between two deities, by sneakily doing the vows and becoming a second husband!
"The disgrace of heaven has arrived, the Trickster God! Why on earth would you ruin a sacred wedding of two perfectly dark souls?"
"Because I wanted your wife too, my Dark Lord. But don't worry I am a shape shifter, so I can transform and be your other wife too. Hehe."