It is the weakest arm, and only attacks with its physical and its special attack Rapier, a slightly stronger attack. It is easy to kill using physical attacks or Ice-elemental spells. The easiest way to defeat Rahu is to summon Catoblepas at the beginning of battle, both Rahu and Ketu are not immune to Petrify.
[view·edit·purge]In Hindu tradition, Rahu is a severed head of an asura, that swallows the sun causing eclipses. He is depicted in art as a serpent with no body riding a chariot drawn by eight black horses. According to legend, during the Samudra manthan, the asura Svarbhānu drank some of the amrita (divine nectar). The sun and moon realized it and alerted Mohini (the female avatar of Vishnu). Mohini cut off Svarbhānu's head before the nectar could pass his throat. The head, however, remained immortal due to the effect of amrita and became Rahu.