Blessing of Seren

 is an active skill that can be taught to Priests at level 34 and can be ranked up at later levels.

can be performed with a staff by the Priest to give an endurance buff to him/herself and 4 other nearby characters.

Strength of the buff varies depending on skill rank.

Rank table
To obtain and upgrade, one must find a Magic Instructor and pay a certain price of gold dependent on rank.

Glyphs
To glyph, a glyph must be obtained and learned only once. At level 60, a character has 50 glyph points available to spend on all available priest glyphs. Most glyphs, specifically common glyphs can be purchased from a Glyph Master, while fine glyphs must be looted from enemies.

(Disclaimer: As NPC shop prices vary depending on a variety of factors, the prices below are subject to variation. Only take them as benchmarks.)