Istraega, Mother of Assasins

Haste, Deathtouch, Unblockable
{u}{u} Istraega gains Hexproof until end of turn.
{t}Target creature you control gains deathtouch
until end of turn, it fights target creature
you don't control.
Anytime an opponent is dealt damage, place a
+1/+1 counter on Istraega, do this
only once per turn.