I'm probably missing something.. but I can't seem to use primordial vengeance on anything.

> grep "You cannot call" logs/*
You cannot call nature's vengeance upon a frost giant
You cannot call nature's vengeance upon Queen Liatris.
You cannot call nature's vengeance upon an orcish castle raider.
You cannot call nature's vengeance upon a wretched arial prisoner.
You cannot call nature's vengeance upon an orc breeder.
You cannot call nature's vengeance upon a goblin messenger.
You cannot call nature's vengeance upon an aged Afskyelige healer.
You cannot call nature's vengeance upon a goblin thug.
You cannot call nature's vengeance upon someone.
You cannot call nature's vengeance upon Fangrul the black dragon.
You cannot call nature's vengeance upon a giant marine eel.
You cannot call nature's vengeance upon a kuo-toa lieutenant.
You cannot call nature's vengeance upon the carrion crawler.
You cannot call nature's vengeance upon a Talshidar.

Expected: ? Something primordial and vengeful.