Chiros

Chiros is an ancient lava god kaiju that first appeared in episode 4 of the 2000 animated kaiju series, Kong: The Animated Series titled Dark Forces Rising.

Dark Forces Rising
After the Original Kong's demise, Chiros' servant Harpy awoke in his temple and began to search for the Seal of Chiros, with which a ressurection ritual could be performed. Chiros was ressurected, but due to a number of Primal Stones still being on the island he could not reach his full power or leave his temple. Despite this he still fought the new Kong in his bound form, which left him tethered to the center of his temple. In order to better combat Kong he possessed a statue on the temple wall and fought through that instead, but was defeated when Kong transformed into Mega Kong, a transformation made by the combined rage in Kong and his Cyber-Link merge partner Jason Jenkins.

Reborn
The ancient Atlantean monarchs Rahni and Uulak, were reborn in the possessed bodies of Eric Tannenbaum IV and Lua with the goal of vanquishing Chiros who had destroyed their kingdom, an ApBat reported this to Chiros, and he sent Harpy and Onimous to destroy his age old rivals. They were unsuccessful, and were beaten to dust by Kong.

The Hidden Fears
After Harpy, who had been inexplicably revived, poisoned Kong with Mindcrawler venom, Chiros ordered the destruction of the human intruders that Kong had protected. They were yet again unsuccessful due to Kong overcoming the incurable toxin.