How does Mercedes Lackey use imagery in Arrow's Flight?

Examples of Imagery:

"Child, your shields are as full of holes as last week's target, and if you weren't so exhausted, you'd be projecting everything under the sun!"

"That horrible feeling of something watching might be gone, but there was still something uncanny about the Forest of Sorrows, something touched with the chill of death and the ice of despair. Whatever power held sway here, it was unsleeping and brooding; she knew it beyond doubt, and somehow knew she was feeling only the barest touch of its power- and she didn't really want to trust the supposed protection of her Whites by venturing too far alone."