Creatures with power less than Silumgar Assassin can't block it.
Megamorph
(You may cast this card face down as a 2/2 creature for 
. Turn it face up any time for its megamorph cost and put a +1/+1 counter on it.)
When Silumgar Assassin is turned face-up, destroy target creature with power 3 or less an opponent controls.
Locations
