The MM3 specifies the traits of the Living Construct subtype:
[bq]- Has Con score. Does not gain bonus hp for size like other constructs, but does get hp for Con.
- No low-light or dark vision.
- Not immune to mind-affecting effects.
- Immune to poison, sleep effects, paralysis, disease, nausea, fatigue, exhaustion and energy drain.
- Can't heal damage naturally.
- Subject to critical hits, Fort-save-based effects, massive damage, nonlethal damage, stunning, ability damage, ability drain, and death effects and necromancy effects.
- Can run.
- Affected both by spells that affect living creatures and constructs. Only gets half effects from spells of the Healing subschool.
- Does not take damage by acting at 0 hp. Does not lose hp when below 0 (but is still disabled at 0 and unconscious below).
- Can be raised or resurrected.
- No need for eating or sleep, but still get benefit from potions and things like heroes' feast. Spellcasters still need 8 hours of rest to regain spells.[/bq]