The Anchor of Infinite Echoes

When the barrier finally fell, Classic Sans thought his biggest challenge would be learning how to nap in the sunlight. But the peace of the Surface is shattered when W.D. Gaster returns from the Void, intent on "resetting" the multiverse by harvesting the power of every AU Sans in existence.

After a mass kidnapping leaves the multiverse's strongest protectors trapped in Gaster's corrupted laboratory, it's up to a motley crew-Classic, his best friends Carrot and Forest, and a resilient human named Rin-to stage a daring prison break.

Now, with dozens of Sanses-from the murderous Dust to the flamboyant Lust and the glitchy Error-crammed into the tiny Snowdin skeleton house before going back to the Aus mansion, Classic finds himself the reluctant center of attention. As the AUs find themselves drawn to his "Original" stable soul, Classic must navigate their complex feelings, Rin's mysterious past, and Gaster's looming shadow.

It's a race against time to fix the Multiverse Mansion before Gaster deletes the "Original" timeline for good. But between the bathroom queues from hell and the accidental Gaster Blaster skirmishes in the backyard, Classic is starting to think the Void might have been quieter.