User blog comment:JBox2D/Kal'Dath/@comment-7709681-20140622194049/@comment-24090662-20140624215155

The entire point is that he's switching between targeting enemies and targeting allies. At early ranks the ability has a long cooldown so that you have to think about which mode you want to be in.

Yes, each ability has a downside when used on an ally, that's his theme. You're stunning an ally for 1.25 seconds, but you're giving them an absolutely enormous heal. You make them go fast but slow them after, hopefully they're smart enough to get to safety when the slow happens. etc.