Blessing

Blessings are a form of magic related to the words of prayer. One has to pray to the gods to receive their blessings. Blessings look like glowing bits of light.

Greetings
Blessings are used when people (at least one noble) meet each other for the first time. Nobles bless their encounter by putting in a small amount of mana into their ring, which then flies to the other party. The current season determines the words of blessing, as each season has a different patron god or goddess corresponding to it.

Temple Ceremonies
When holding a ceremony like the baptism ceremony, the High Bishop's job is to bless the people attending the ceremony. As only nobles could bless using their mana, as a ring is required, the former High Bishop Bezewanst wasn't able to truly bless the audience, leaving him only speaking the words of prayers.

Enhancing properties
Blessings may take immediate effect and enhance certain properties temporarily. As seen at the time of the trombe extermination, Myne prays to the God of War Angriff, giving them the blessing of Angriff which enhances the combat ability of the knights present. The Knight's Order prayed to the God of Darkness to receive his blessing, turning their weapons into black weapons giving them the property to absorb mana.

Trivia

 * When Rozemyne became the High Bishop, it is said that she gave real blessings, thus beginning her legend of the saint in the lower city