They are immune to water-based attacks, and their hard shell affords some protection from flame-based attacks such that they gain a +2 on all saving throws vs. fire and suffer -1 point of damage per die (though never less less than one). However, being the creatures of warm tropical oceans, sartani are particularly vulnerable to cold. They save against cold-based attacks at -1 and suffer an additional point of damage per die. A cone of cold causes damage and slows the creature to half normal speed if the saving throw is failed. This frost rigidity lasts for 2d4 rounds or until the creature can completely immerse itself in the warm sea for one round.