A volcanic eruption releases the Rock Giant, a huge lava monster. Mumm-Ra suborns the giant to destroy the Thundercats. The storm, which accompanies the eruption, strands the Thunderkittens in a forest. Lion-O and Panthro set out in the ThunderTank to rescue them but before Lion-O and Panthro can reach them, Jackalman attacks the Thunderkittens in a SkyCutter. The Thunderkittens conjure up a Flying Saucer from their magic pellets, cause Jackalman to crash and seize the SkyCutter. When Lion-O and Panthro see the SkyCutter, they assume it is hostile - and almost shoot the Thunderkittens out of the sky. No sooner are the Thundercats safely in the ThunderTank and en route for the Cats' Lair, than the Rock Giant attacks, pursuing the ThunderTank all the way to the Lair's doorstep.
Lion-O, Panthro and the Thunderkittens manage to escape from the tank before it is wrecked. The Rock Giant proves impervious to the Thundercats' weaponry and Lion-O eventually faces it alone. Jaga appears and urges Lion-O to recall how the ancients used the power of extreme heat and cold to split and shape even the hardest rocks. Lion-O uses the Sword of Omens to bring the Rock Giant to white heat, and then lures him into the icy waters of the Lair's moat. The sudden change in temperature shatters the Rock Giant.

This episode can be found on

Disc 8

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