Gwen, The Shallowed Seamstress

Lifelink, Hexproof
Snip, Snip!-Whenever Gwen attacks, put a precision counter on her. Then, she deals damage equal to the number of precision counters on her to up to one target creature. If that creature dies this turn, draw a card.
Hallowed Mist-{2}{w}{w}: Prevent all damage that would be dealt to Gwen this turn.