Ian Dunai is trapped in the only maze an arch-decemancer can't escape. Time.

Only 1% of the population is blessed with magic affinity at birth. Fewer still have high enough affinities to rule. Ian’s decemancy eclipses all, granting him ultimate control over Death. He conquers cities with a thought and turns them into ruins with a gesture. But overwhelming power isn’t enough to escape the time loop or reveal its purpose.

When Ian discovers a critical clue that he missed years ago, escape is finally at his fingertips.

Little does he know, he's been stuck in the first realm.

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?