Xithi, Guide of the Lost

Menace, Ward—Xithi, Guide of the Lost's
controller creates 0/1 black Cultists equal
to it's toughness.
If this card would be cast from exile it has
Convoke.
Xithi, Guide of the Lost cannot be blocked
by creatures with greater power than it and
whenever it destroys a creature it gains a
+1/+1 counter.