Paradox is getting married!

For a super-wedding, things are relatively uneventful, but during the reception, he learns about the biggest problem with their upcoming destination

The world is ending within the next six months, as prophesied by a time-traveling eldritch demigod!

Who is responsible? Is it one of Paradox's many enemies, a dangerous abomination resurfacing from his past mistakes, or an unstoppable force of nature that has always been on his side?

Why not all three?

More importantly, how does he stop it?