Heliana's Guide to Monster Hunting, pg. 510
2nd ring Divine, Abjuration
You trace a warding sigil in the air, sending it to slowly circle a willing creature you can see for the next hour. Immediately before the target next takes damage, except psychic damage, the ward triggers. Until the end of the target’s next turn, it has resistance to all damage excluding psychic, including the triggering damage. The warding sigil then disappears, and the spell ends on the target.