War for Redemption

Above all beings, there exists the Progenitor. He who creates, he who destroys, he who governs over the living and the dead.

One day, on a whim, he decided to create a game. He picked eight suitable candidates who were set to die from the planet Earth and assigned each the soul of a monster from the planet Arcania that fit a certain requirement.

Along with their companion monster, the chosen eight participate in a battle to the death set in another world.

The prize? The last one standing will live once more as the losers return to an eternal slumber. One will remain and rest will be the stepping stones for the winner in this War for Redemption.

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tl;dr: God creates a 16 man battle royale with teams of two, a human and a monster. Last team standing wins.