The trick is to leave them permanently petrified instead of killing them.

Why would you kill the lich? Just cast Stone to Flesh and leave them petrified forever. If you really want to be thorough, you can trap them in a demiplane just before casting Private Sanctum for the 365th time permanently blocking it from interplanar travel.

I’d rather have the body with the soul kept in a constant state of euphoria.

And sometimes the official stats suck. The 2014 Tarrasque was just sad. And if Tabaxis get Cat’s Claws, Cat’s Talent, Feline Agility, and Darkvision, cats should have those too. Along with a jump height of more than -1 feet.

Call an elf a slur and he’ll hold a grudge for 150 years.

Call a dwarf a slur and he’ll write it down in the Book of Grudges and he and his kin will hold it against you and yours until the grudge is settled.