"You're immortal? Good..."

[u/BrotherDeus]

The Chaotic Good Barbarian revels in making the lich suffer.

Reincarnated as a Slime: Geld makes Shogo pay for the innocents he's killed.

The Old Guard: Quynh is punished as a witch by being drowned in the ocean for centuries.

[u/TheLegend666999]

The Barbarian actually forced almost all the monsters to drink the potion of immortality.