The Nagaraja is an enemy in Final Fantasy IV: The After Years. It is moderately powerful, and will generally attack with physical attacks. If damaged by any magic attacks and not defeated, it will counter by casting Silence on a random party member. Regular attacks and Bio spells work well enough in dispatching them.
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Etymology
"Nagaraja" is a Sanskrit word from naga (snake) and raj (king) meaning King of Snakes.