Nualia, Wayward Aasimar

Menace
When Nualia, Wayward Aasimar attacks, you
may sacrifice another creature you control.
When you do, put a +1/+1 counter on Nualia
and she gains deathhtouch until end of turn.
At the beginning of your end step, if Nualia,
Wayward Aasimar has three or more +1/+1
counters, you may pay 4 life. When you do,
transform her.