[HoneyBadger]

Maybe a resistance to paralysis, in the same way a unit might be resistant to fire, ice, poison, shock?

Alternatively-but along a similar vein-maybe a more broad resistance to psychic attack/mind damage, that also functions as the current fire etc. resistances. The latter would allow more anti-R'lyeh strategies, which would then probably make Late Era games more fun. LA Ermor already has a broad "blast 'em with holy magic!" emergency plan, so something like this seems fitting.