What exactly are a valkyrie's powers? since danielle got her valkyrie powers im seeing her eyes glow blue or red. Im very curious as to what that means for her and other valkyrie powered characters.

She doesn't have them any more.  Originally she had death vision (see when Death will take a person) & the ability to fight off Death... and a pegasus who was connected to her soul.  During Utopia & Siege she temporarily gained super strength along with all her previous abilities.... but they're gone now.  She's back to being an angry young woman who talks with her fists :p

The power allows them to talk, to see the souls of the death and collect them so they can go where they need to go to rest or to pay punishment. Woaaah!!