+140 Ability Power
+10% Cooldown Speed
Gains a shield that absorbs (450+hero’s level*50)+40% ability power damage when HP falls below 40%. The shield lasts 4 seconds and has a 75-second cooldown.
Magic Life Steal
Magic Life Steal +25%
Best sustain item for mages. 25% Magic Life Steal with an added shield when you are low on health can be the difference between remaining in battle and teleporting to base (or graveyard).
In sustain builds usually it is the third item to complete. One of the top priority items for diving mages like Tulen, Raz, Zill, Lauriel, and Jinnar.