Planescape: Twilight of the Idols
Modron Racial Traits:
Unlike most constructs, living constructs have a Constitution score and do not get bonus hit points based on their size.
Unlike other constructs, living constructs do not have darkvision or lowlight vision.
Unlike other constructs, living constructs are not immune to mind affecting effects.
Living constructs are immune to disease, exhaustion, fatigue, being nauseated, negative energy, being sickened, paralysis, and poison.
Living constructs do not heal damage naturally.
Unlike other constructs, living constructs are subject to critical hits, effects requiring a Fortitude save, death from massive damage, non-lethal damage, stunning, ability damage and drain, and death effects or necromancy effects.
Unlike other constructs, living constructs can use the run action.
Living constructs are affected by effects that target living creatures as well as effects that target constructs.
Living constructs can be raised or resurrected.
Living constructs do not need to eat, drink, sleep, or breathe, but can still benefit from the effects of consumable potions and magic items. Living constructs must rest 8 hours before preparing spells.