New mage item suggestion Eye of the Herald

Eye of the Herald 100 ability power Unique passive: 25 Magic penetration Unique passive: 10% cooldown reduction Unique passive: Piercing Sight; Dealing spell damage deals 5-60 true damage based on lvl over 2 seconds and grants vision of the target. Unique passive: Heralds eye; Abilities and attacks that hit you from behind deal 5% more damage stacking up to 3 times, stacks last 2 seconds, once stacks are lost this passive goes on a 5 second cooldown.

Cost 3500 (Stats are worth 3353) Builds from & +1430 Combine cost