In my opinion, you should make the mammoth stand out better, as in, instead of a silhouette, it could be a bright cyan color or perhaps ghostly like a spirit. It would make perfect sense, for an ability like "Ancestral Spirit" or so, as right now it looks like a silhouette with strange highlights, completely unfitting the whole idea of a dark silhouette(although the eyes fit perfectly, the highlights on the trunk etc don't fit that well).