Worldbinder is an epic fantasy novel by American writer David Farland, the sixth book in his series The Runelords.

It is set in a land where men can bestow on each other a number of endowments, granting the recipient attributes such as increased strength, a more acute sense of hearing, or better eyesight.

The novel combines traditional sword and sorcery elements of fantasy with its own unique magic system of endowments.

For example, some people who happen to be standing in the wrong place recover from the melding of the two worlds to discover that they have a vine growing through their hand.

Even though the Knights Eternal are rumored to be impossible to slay except in daylight, Fallion and Jaz manage to kill one before they are taken captive by one named Vulgnash.