So they are immune to Sniper, RoF (since it doesn't 'target' them), Fire Buckler, Unstable Gas, and Thunderstorm? Am I missing anything?
Yet, EVERY spell is an insta-kill? Phase Recluse has comparable stats but only costs 4 to summon, yet this isn't any harder to kill.
How does this work with poison? Are they immune from Plague/Spine Carpace/Infection?