New unique: Aizul, disgraced guardian naga turned naga warrior.

Casts Venom Bolt, Blink Other, Ensorcelled Hibernation, Slow and heals
himself. Comes with a ruby-red naga barding, a shield, and a chance of a
very nice weapon. Can appear on Snake:4 and Snake:5, and also on similar
dungeon levels to Margery and co.

Backstory: the guardian of a horde of treasure who fell asleep on the
job. Thieves raided the place, and he was disgraced and kicked out.
Turned to the role of a warrior, seeking redemption through battle.

Currently, there's something weird with the debug build at 'xv' for
monster description not displaying the right information all the time.

1 files changed, 18 insertions, 0 deletions

diff --git a/crawl-ref/source/makeitem.cc b/crawl-ref/source/makeitem.cc
index 17b6e1a314..48b12b2c3f 100644
--- a/crawl-ref/source/makeitem.cc
+++ b/crawl-ref/source/makeitem.cc
@@ -3502,6 +3502,16 @@ static item_make_species_type _give_weapon(monsters *mon, int level,
             do_curse_item(item);
         break;
 
+    case MONS_AIZUL:   
+        if (one_chance_in(3))
+            level = MAKE_GOOD_ITEM;
+
+        item_race      = MAKE_ITEM_NO_RACE;
+        item.base_type = OBJ_WEAPONS;
+        item.sub_type  = random_choose(WPN_HALBERD, WPN_SCIMITAR, WPN_GREAT_MACE,
+                                       WPN_LONG_SWORD, WPN_EVENINGSTAR, -1);
+        break;
+
     case MONS_GNOLL:
     case MONS_OGRE_MAGE:
     case MONS_NAGA_WARRIOR:
@@ -4387,6 +4397,7 @@ void give_shield(monsters *mon, int level)
         make_item_for_monster(mon, OBJ_ARMOUR, ARM_LARGE_SHIELD,
                               level * 2 + 1, MAKE_ITEM_RANDOM_RACE, 1);
         break;
+    case MONS_AIZUL:
     case MONS_DONALD:
         make_item_for_monster(mon, OBJ_ARMOUR, ARM_SHIELD,
                               level * 2 + 1, MAKE_ITEM_RANDOM_RACE, 1);
@@ -4675,6 +4686,13 @@ void give_armour(monsters *mon, int level)
         force_colour   = LIGHTCYAN;
         break;
 
+    case MONS_AIZUL:
+        item_race      = MAKE_ITEM_NO_RACE;
+        item.base_type = OBJ_ARMOUR;
+        item.sub_type  = ARM_NAGA_BARDING;
+        force_colour   = RED;
+        break;
+
     default:
         return;
     }