animist primordial vengeance

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.