Concordance

The Concordance was a divine agreement among the Greater Gods to follow a set of rules in order to avoid cataclysmic events within the material planes. It's chief authors were Velka, Amar, and Nito. The document is broken into commandments. Notably the Concordance does not apply to Lesser Gods or other powers, although they are typically too weak to warrant their inclusion.

The First Commandment - Non-Interference
The First Commandment of the Concordance involved a policy of non-interference within the Material Planes. In practice, these gods still hold great sway through their followers and are still allowed to grant powers to clerics, paladins, and the sort. However, these gods are not allowed to supply their faithful with god-crafted magical artifacts, the ability to traverse planes, or interrupt the natural flow of time (an ability reserved only for the most powerful of deities). Members of the Concordance are also forbidden from creating avatars or physical representations of themselves within the material world, with rare exception, although some lesser forms are tolerated, like Nito's Death Wardens.

The Second Commandment - Sealing the Beast
The Second Commandment of the Concordance involved sealing fellow Greater God Anarcathus in the Abyss. This imprisonment was successful, but had the unintended consequence of spawning a seemingly infinite and reproducing hoard of demons, starting the Blood War.