Shalltear, Poised For Combat

First strike, Critical hit(whenever this creature is
blocked, you may make that creatures toughness the
same as its power until end of turn. )
As long as Shalltear is modified it has prowess.
{1}, Sacrifice an artifact: Shalltear gets +1/+1
until end of turn.
killed on the steak, buried in the grave, rebuild her,
perfect her, we cannot return her humanity, but we will
make use of that cursed blood for mankind.