Slerrio Sli

Extort (Whenever you cast a spell, you may pay {w/b}. If you do each opponent loses 1 life and you gain that much life.)
Other Rogues you control have First Strike.
Whenever you sacrifice another creature, put a 1+/+1 counter on this creature and scry 1.
{t} Remove a +1/+1 counter from this creature, it fights another creature.