They can be annoying as they come in groups and can buff each other up. All of its type are weak against water spells, which can be exploited to stagger them quicker. A Saboteur can be included in the party to inflict Deprotect and Slow upon them.
Yaksha is the name of a broad class of nature-spirits, usually benevolent, who are caretakers of the natural treasures hidden in the earth and tree roots. They appear in Hindu, Jain and Buddhist mythology. A yakshini is the female counterpart of the male yaksha, and they both attend on Kubera (also called Kuber), the Hindu god of wealth who rules in the mythical Himalayan kingdom of Alaka. They resemble that of fairies.