Strygwyr, hound of the Twins

Haste, double strike, lifelink
Strygwyr, hound of the Twins gets +1/+1 for
each blood counter you have.
Thirst—Whenever a creature dealt damage by Strygwyr this turn dies, you get a blood counter.
Pay 2 blood counters: Strygwyrm fights target creature you don't control that was dealt damage
this turn.