Eileen the Crow

First strike
Eileen the Crow enters the battlefield with 5
Blood Vial counters.
Remove a Blood Vial counter: regenerate Eileen
the Crow, only do this once per turn.
Whenever you remove a Blood Vial counter from Eileen the Crow put a +1/+1 counter on Eileen
the Crow.
"Without fear in our hearts, we're little different from
the beasts themselves."
—Eileen the Crow