The Creeds Stash

{p/b} {p/w}{b}:The next time a rogue you control deals damage it gains +2/+2
until the end of the turn
{p/b}{p/w}{w}: The next time an assassin deals damage target creature an
opponent controls gets -2/-2 until the end of the turn.
Assassins and rogues you control get +1/+1.