In this Earth-like world, gunpowder was invented just recently. After a secret lab exploded while trying to create a bigger bomb, an apparently very angry titan suddenly rose from the rubble. Luckily, he (or she) has no legs (that we can see) and never tries to walk anywhere. He (or she) has been content just sitting there wailing and spewing lava constantly for the last 5 years.
Last month, however, he suddenly changed tactics. He somehow molded lava into big, very dense rocks and threw them all over the world. His throw could easily destroy a town a continent away. Yes, his throwing skill is very awesome.
Maybe some heroes, or some armies, one day could vanquish him (or it). Today, however, we civilians only want to survive. How would we adapt to living with this monstrosity? Not all of us could move to a far, far away continent.
Info: the titan is a little smaller than Mount Fuji. The technology level is about the same with Earth when we first invented bomb.
Edit: By titan, I mean a huge rock giant, spewing lava through his mouth. By molding, I mean he spit lava to his hands (yes, disgusting) and somehow make it dense, then throw at anything that move, or if no target in sight, just aim randomly. His throw rate is about 1.5 a day, a bit slow, but he is huge, and the rock is really big.
In the 5 years that he was crying, the whole area around him was destroyed. All people dead. The further ones count themselves lucky. The current state of the area around the mountain is similar to Mordor.