Adds +4 to Reflex saving throws vs. being entangled in a web. This item does not provide any benefit for non-web entanglements.
Ranger
Adds +1 to Constitution (depending on initial Constitution score, either 0/+1 to max HP per character level and 0/+1 to Fortitude saving throws)
Sonic damage inflicted on the wearer is reduced by 1 point per attack/effect
User’s melee weapon attacks (including monk open hand) deal +2 Damage as Fire
Bestows immunity to toxic gas
Unlike Ioun Stone Iridescent Spindle, Ioun Stone Iridescent Sphere does not negate the need to breathe and is effectively useless underwater.
Sustains the character without air. It doesn’t actually allow the character to breathe in a hostile environment, it negates the need to breathe. It can be used underwater to avoid drowning, in water to avoid ingestion of toxic fluids, and on dry land to avoid inhaling toxic gas–though it has no effect on toxins which are absorbed through the skin or injected.