Asahina, Master Assassin

First strike
Tantojutsu: Whenever Asahina, Master Assassin attacks, attacking creatures your control gain deathtouch until end of turn.(Creature gets Tantojutsu if it is equiped.)
{r}{w}{b}: Until end of turn, whenever a creature
you control attacks, put a +1/+1 counter on it.
You may activate this only once per turn.