Thran, Cunning Assassin

Deathtouch
Whenever Thran, Cunning Assassin enters
the battlefield. Target creature gets a -1/-1
counter.
Whenever you attack. Target attacking creature
you control gains deathtouch until end of turn.
If that opponent has 7 or more creatures in their
graveyard. Target creature gains deathtouch and
+5/+0 counters until end of turn.