Ava Markov

Flying, Deathtouch
When Ava Markov enters the battlefield or attacks, put a +1/+1 counter on target vampire you control. That creature gains lifelink until end of turn.
"We both want my brother gone, so why not form an alliance? It's time for the Lord of Innistrad to be kicked off of his throne."
- Ava Markov, to Nahiri