This building has no upgrades. This means that this building can not gain any sort of permanent boost from upgrades found in either its palantir or from other units/heroes. If this is not the case, fill in the section following the policy.
Durin's Monument serves as a support structure: nearby allied troops gain +20% armor and damage. The effect lingers up to 30 seconds after units leave the vicinity of the monument. It also provides a reduction to the cost of heroes up to 30% in this manner: