This item comes from the tower conquest side quest with Oskar Crowfriend in Dragonspyre in The Tower Archives zone.
After you finish his quest, he dumps this amazing sun dial on you.
Such a nice lawn item there. They definitely have built a very menacing looking sundial there. haha. "Hmm, let me check the time on my sundial . . . I'm going to stand back though because it looks like it might get mad and eat me."