Amulet of guardian spirit, it comes as an amulet or a cap.

When worn, all non-poison damage will drain mana instead, hurting hp
only after mana is depleted.

The cap brand is intended only for a fixedart, but per dpeg's request,
it will be generated on ordinary caps for now, as a test.

1 files changed, 6 insertions, 1 deletions

diff --git a/crawl-ref/source/makeitem.cc b/crawl-ref/source/makeitem.cc
index 10dc28ff7c..45e2ce8f87 100644
--- a/crawl-ref/source/makeitem.cc
+++ b/crawl-ref/source/makeitem.cc
@@ -2033,8 +2033,13 @@ static special_armour_type _determine_armour_ego(const item_def& item,
         }
         break;
 
-    case ARM_HELMET:
     case ARM_CAP:
+        if (one_chance_in(10))
+        {
+            rc = SPARM_SPIRIT_SHIELD;
+            break;
+        }
+    case ARM_HELMET:
         rc = coinflip() ? SPARM_SEE_INVISIBLE : SPARM_INTELLIGENCE;
         break;