diff --git a/skills/coa-db-skill/SKILL.md b/skills/coa-db-skill/SKILL.md
index 9826fdd..71bfe3d 100644
--- a/skills/coa-db-skill/SKILL.md
+++ b/skills/coa-db-skill/SKILL.md
@@ -45,7 +45,7 @@ quality color (`q0` poor … `q4` epic, `q5` legendary, `q6` artifact).
 | `GET /api/v1/spells/{id}` | spell detail |
 | `GET /api/v1/npcs/{id}` | NPC detail |
 | `GET /api/v1/quests/{id}` | quest detail |
-| `GET /api/v1/spells?mechanic=&effect_mechanic=&dispel_type=&limit=&cursor=` | filterable spell catalogue (keyset-paginated; `cursor` = last id seen, `limit` 1–1000 default 200) |
+| `GET /api/v1/spells?mechanic=&effect_mechanic=&aura=&dispel_type=&limit=&cursor=` | filterable spell catalogue (keyset-paginated; `cursor` = last id seen, `limit` 1–1000 default 200) |
 | `GET /api/v1/changes` | newest-first change_event log |
 | `GET /api/v1/health` | `{status, version, database}` (200 even in fixtures-only mode; data endpoints return 503 if `database=false`) |
 
@@ -73,8 +73,16 @@ not yet catalogued). `description` can contain `@…@`-wrapped flavour tags
 curl -s 'https://db.exil.es/api/v1/spells?mechanic=15&limit=1000'
 # every Poison-dispellable aura (dispel_type 4)
 curl -s 'https://db.exil.es/api/v1/spells?dispel_type=4'
+# every damage-absorb shield (aura 69 = SCHOOL_ABSORB)
+curl -s 'https://db.exil.es/api/v1/spells?aura=69&limit=1000'
 ```
 
+The `aura` filter matches any effect whose applied aura equals the value:
+69=SCHOOL_ABSORB (damage-absorb shield), 354=CoA heal→absorb proc,
+301=SCHOOL_HEAL_ABSORB (anti-heal debuff). AND-combines with the other
+filters. It is live on db.exil.es now; don't gate on the `/health` `version`
+field, which currently lags the deployed feature set (reports 0.1.0).
+
 Common codes: mechanic 15=Bleed, 1=Charm, 19=Disarm; dispel_type 1=Magic,
 2=Curse, 3=Disease, 4=Poison.