Neutral not so epic gate Xorn

[Nemni]

I’ve been thinking about taking the feat Epic Gate for my warlock, as it seems to be the only non-evil summon available to the class, and it's kinda cool. However I’m told that for epic gate one cannot pick what creature is summoned, and that the neutral Xorn is “basically worthless”.

Is it true that the epic Xorn is that bad? Because of behaviour or stats? I’ve searched but not found any real information about this. I’ve seen plenty of summoned angels and a couple of balors, but never a xorn that I can remember. Probably a bad sign for its usefulness. Does anyone know the stats and/or spells used?

[Valefort]

Neutral gives an angel, there is no epic Xorn.

[Nemni]

Well that explains why I never saw one. Thanks