I'm wondering if there's some sort of reason why this ability is capped at CR20 summons. It becomes essentially worthless the moment you move past around 24-25th level if you're running on epic NORMAL, let alone epic hard or elite. On epic elite, it's completely outclassed by level 22-23. Considering you can't control it, is there some reason why it can't be bumped up to be summoned at 20 + your epic level? Even if it caps at level 30, it would still be more useful. If that would make it "too powerful", perhaps move it higher up into the tree, like the Primal Avatar "Primal Ally" ability is.