Infin, Right Hand of Shadows

Deathtouch, intimidate
Rogues you control become assassins in addition
to their other types.
Whenever a creature an opponent control dies,
you may pay {w}{u}{b}. If you do, that creatures
controler creates 1/1 black rogue token named
"Agent of Shadows" with "At the beggining of
each upkeep, you loose life equal to the number
of creatures named Agent of Shadows".
You and creatures you control have protection
from Agent of Shadows.