Kalia is a purple, six-armed, cobra-headed, hovering monster.
Kalia hovers far out of the Master's reach and attempts to either crush him with levitating, spiked platforms, or send a lance of lightning down at the floor, which then rolls away as ball lightning. Kalia will telegraph the platform drop by signalling with its arms, and will spend a second or two casting before it launches the lightning bolt. Kalia's blue platform functions as a shield.
The Master's only real method of damaging Kalia is to dodge the spiked platforms that it calls down, then ride them back up to slash twice at Kalia, then dash off the platform before it contacts the spike ceiling. It's a slow method, but careful practice will make this easy. Alternatively, Magical Stardust can inflict serious damage, but it's not always effective due to Kalia's size and speed.
Kalia seems to be based on a combination of Hindu gods and creatures, such as Ganesha, Vishnu, Indra, etc. among others who are all depicted as having multiple arms, and the Nagas, who were depicted as somewhat positive serpent-beings.
The name "Kalia" most likely comes from "Kali", the Hindu goddess of Time, Change and, ultimately, Death.
His appearance also gives allusion to that of Devadatta, who was described to have been the jealous rival of Buddha after he became enlightened and expanded his sangha. At first a disciple, Devadatta decided show off his powers to impress Buddha, and used illusions to attain the local prince as a follower by presenting himself as a young boy with snakes all about him and sat on the prince's lap, impressing him. Later, when angry that his feat did not impress Buddha and did not allow him to lead the sangha, he tried kill Buddha with many methods, including assassins and assassination, but failed; he then tried to cause a major schism by gathering friends within the sangha and proclaiming his new religion with their own austerities, being baseless extremes such as living in the woods away from all social contact, living in extreme poverty and off of begging, and abstaining entirely from fish and flesh. He too failed in this attempt. His end has many tragic interpretations; one saw him stricken with illness and guilt, but was too late to ask for Buddha's forgiveness, another saw him giving into desperation to gather followers, giving into attacking Buddha at his most vulnerable, his influence getting his princely follower to exile him from the land, and his fate to be decided by Buddha himself upon being caught, but all end with him being sent to Naraka, or Buddhist Hell.