Purifying Circle

 is an active skill that can be taught to Priests at level 16. It cannot be ranked up at later levels.

can be performed with a staff by the Priest to remove harmful effects from allies and self. The Priest can tell when allies are debuffed when their HP bar turns purple. When this is the case, this spell should be cast ASAP. This spell is frequently comboed with right afterwards.

Rank table
To obtain, one must find a Magic Instructor and pay a certain price of gold. This skill cannot be ranked up.

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.)