A Blessed unit has +1 Morale, if their Pretender God is staking a claim. Only Sacred beings can be Blessed, including the Pretender Gods themselves (who are always blessed in this game).

Is that all there is to it? No; one of the great things about Dominions 6 is that you get to customize your Blessing.

Bless-building is done when you create your Pretender God. It's a facet of their religion, like Dominion strength and Scales.

Pretender Gods get one Bless Point for every level of Magic skill they have, above the first level in each path. Certain especially-faithful nations start with bonus Bless Points, too. These are then used to purchase Bless Effects for your Blessing.

The price of a Bless Effect matches the amount of magic levels required to obtain it. Since Bless Points are all pooled, though, you can devote all of your Bless Points to Bless Effects of the same Magic path, if you so choose. Some Bless Effects require certain Scales, too; these aren't factored into the cost.

Note that certain Bless Effects – generally the pricier ones – require the Pretender God to be incarnate. That means the Pretender God must be alive, on the map. If you decide to have your Pretender start out Dormant or Imprisoned, for additional Design Points (which can be used to purchase additional Bless Points), you delay when those "Incarnate Bless Effects" start to work.

A few Bless Effects are always active on Sacred units, and don't require the Blessing to be laid upon the subject. This page (and some other guides) will call these effects "innate".