his is the Symbol of Avacyn:
Selfless Cathar | Art by Slawomir Maniak
If you know where to look, you can see it all over Innistrad. It's frequently seen on staffs.
Avacynian Priest | Art by Greg Staples
Sometimes it's being destroyed.
Ancient Grudge | Art by Ryan Yee
Sometimes it's being used as a weapon.
Moment of Heroism | Art by Christopher Moeller
Sometimes it's even made out of laurels.
Elder of Laurels | Art by Terese Nielsen
The more you look for the Symbol of Avacyn, the more you'll see it. In fact, if you scroll back up to the top of this article and look at the art for Selfless Cathar again, you'll find another example beyond the obvious one. See the handle of the Cathar's weapon? Does the circle at the base look familiar now?