Shadow god: Shadow Form.

For 9 MP, 10 piety, and skill drain, you transform into a swirling mass
of dark shadows with immunity to poison, draining, torment, and hostile
enchantments as well as 50% damage reduction and a transformation of
your bled smoke into miasma (guaranteed on hit). However, you also only
deal 50% melee damage and suffer a double-strength spell anti-enhancer.

1 files changed, 23 insertions, 1 deletions

diff --git a/crawl-ref/source/ability.cc b/crawl-ref/source/ability.cc
index f63da87061..efae1928b9 100644
--- a/crawl-ref/source/ability.cc
+++ b/crawl-ref/source/ability.cc
@@ -104,6 +104,7 @@ enum ability_flag_type
     ABFLAG_LEVEL_DRAIN    = 0x00010000, // drains 2 levels
     ABFLAG_STAT_DRAIN     = 0x00020000, // stat drain
     ABFLAG_ZOTDEF         = 0x00040000, // ZotDef ability, w/ appropriate hotkey
+    ABFLAG_SKILL_DRAIN    = 0x00080000, // drains skill levels
 };
 
 static int  _find_ability_slot(const ability_def& abil);
@@ -192,7 +193,7 @@ ability_type god_abilities[NUM_GODS][MAX_GOD_ABILITIES] =
       ABIL_ASHENZARI_SCRYING, ABIL_ASHENZARI_TRANSFER_KNOWLEDGE },
     // Dsomething
     { ABIL_NON_ABILITY, ABIL_DSOMETHING_SHADOW_STEP, ABIL_NON_ABILITY,
-      ABIL_NON_ABILITY, ABIL_NON_ABILITY },
+      ABIL_NON_ABILITY, ABIL_DSOMETHING_SHADOW_FORM },
 };
 
 // The description screen was way out of date with the actual costs.
@@ -403,6 +404,8 @@ static const ability_def Ability_List[] =
     // Dsomething
     { ABIL_DSOMETHING_SHADOW_STEP, "Shadow Step",
       4, 0, 0, 4, 0, ABFLAG_NONE },
+    { ABIL_DSOMETHING_SHADOW_FORM, "Shadow Form",
+      9, 0, 0, 10, 0, ABFLAG_SKILL_DRAIN },
 
     { ABIL_STOP_RECALL, "Stop Recall", 0, 0, 0, 0, 0, ABFLAG_NONE},
 
@@ -714,6 +717,9 @@ const string make_cost_description(ability_type ability)
     if (abil.flags & ABFLAG_STAT_DRAIN)
         ret += ", Stat drain";
 
+    if (abil.flags & ABFLAG_SKILL_DRAIN)
+        ret += ", Skill drain";
+
     // If we haven't output anything so far, then the effect has no cost
     if (ret.empty())
         return "None";
@@ -814,6 +820,9 @@ static const string _detailed_cost_description(ability_type ability)
     if (abil.flags & ABFLAG_STAT_DRAIN)
         ret << "\nIt will temporarily drain your strength, intelligence or dexterity when used.";
 
+    if (abil.flags & ABFLAG_SKILL_DRAIN)
+        ret << "\nIt will temporarily drain your skills when used.";
+
     return ret.str();
 }
 
@@ -842,6 +851,10 @@ static ability_type _fixup_ability(ability_type ability)
         if (you.species == SP_FORMICID)
             return ABIL_NON_ABILITY;
 
+    case ABIL_DSOMETHING_SHADOW_FORM:
+        if (you.species == SP_MUMMY || you.species == SP_GHOUL)
+            return ABIL_NON_ABILITY;
+
     default:
         return ability;
     }
@@ -1059,6 +1072,7 @@ talent get_talent(ability_type ability, bool check_confused)
     case ABIL_JIYVA_CURE_BAD_MUTATION:
     case ABIL_JIYVA_JELLY_PARALYSE:
     case ABIL_DSOMETHING_SHADOW_STEP:
+    case ABIL_DSOMETHING_SHADOW_FORM:
     case ABIL_STOP_RECALL:
         invoc = true;
         failure = 0;
@@ -2836,6 +2850,14 @@ static bool _do_ability(const ability_def& abil)
         }
         break;
 
+    case ABIL_DSOMETHING_SHADOW_FORM:
+        if (!transform(100, TRAN_SHADOW))
+        {
+            crawl_state.zero_turns_taken();
+            return false;
+        }
+        break;
+
     case ABIL_RENOUNCE_RELIGION:
         if (yesno("Really renounce your faith, foregoing its fabulous benefits?",
                   false, 'n')