User blog comment:Draven, the Glorious Executioner/Custom Soraka Rework! (Without Banana-related abilities)/@comment-13536822-20140823202702/@comment-24501229-20140826133501

The ability negates only one single instance of damage and the effects associated from it. I'm not sure you realize what that really means. Sure, you can use it to save someone from a Karthus ultimate fairly easily, but it has a long cooldown, high mana cost, and only lasts 1.5 seconds. In a normal fight you'd have to have godlike reaction skills to block something meaningful with it, not to mention how easily the shield can be popped by ANY damage source. Imagine Sivir activating her shield, only to block the enemy Janna's auto-attack. If anything, I think it might be underpowered.