Nothingness of within thy

This book is all about a normal mortal that was forcibly dragged into a strange world without his willingness. Cursed with immortality as Liam finally decided to settle down in a humble town somewhere on the edge of this strange world. And one day, he finally uncovered the gift from the mysterious voice. Allowing him to create a world inside his pond. "Maybe with this little world, I can find some joy in this boring eternal life"