A command often issued by irritableprinces who have had nine years to build up anger about their family being massacred and five years to dream of killing childhood friends who are believed to have been involved in said massacre.
A saying when your house leader wants you to kill every last one of them. Bonus points if your house leader is consumed by darkness that has built up over the years.
Dimitri: Kill every last one of them!
Me: No!! We can't dude, we have too many weak units!