A new emperor rules each year in Yohuachanca.

Only the most delicious of food graces his palate; the realm’s most beautiful women fill his harem; his palace dazzles the mind in its beauty; and four priestesses counsel him in all matters. The life of an emperor is good, luxurious, and short. 

For at the year’s end, he is sacrificed to the Nightlords under the light of the Scarlet Moon.

I am Iztac. A pisspoor orphan and the year’s emperor. A sacrifice bound for the altar. 

But the vampires have made a mistake this time. For I am a sorcerer, whose soul journeys into the secret underworld to plunder the secret spells of the dead. There, in the darkness, hides the power to drag the Nightlords off their throne. I have a year to find it, or perish for good.

I may not be the first emperor, but I will be the last.

Dungeons suddenly popped up across the planet, summoning invaders and monsters from alternate realities. Ancient gods slumbering beneath the Earth were woken. And all humans were empowered with Levels and Classes gained by, amongst other things, killing monsters and other humans.

Only a single instruction was provided by the System: “Whoever reaches Level 100 first shall become Earth’s new Overgod.”

So, a worldwide battle of epic proportions erupted... which Basil would rather sit out. Choosing the [Tamer] profession which allows him to speak with his cat, Plato, and other apocalyptic monsters, he'll adopt and train them to fight alongside him and defend his corner of the countryside.

After all, why bother fighting the apocalypse when you can tame it?