I also like to run this card in my Avacyn, Angel of Hope deck as a one-sided wipe after my commander hits the field
This used to be the king of midrange, but power creep has caught up to it
thats the sort of play which will trigger Killer, and all you need from it afterward is to trade off with whatever blocker they play next
It matters not, for the ability to kill Psychatog and Wild Mongrel alike puts Smother firmly in the top ten black instants of all time
But Olivia, Opulent Outlaw has an ability that triggers with the same timing as the partner pirates (Breeches, Malcolm, Francisco), so you could basically run a Breeches + Francisco deck with access to whites cheap removal
You also want to make ample use of the deathtouch ability, both as board control and value with Shelobs second ability