Make Hep give innate frail 1

The god is a bit too strong right now; this seemed like the most
fun way to weaken it. (I don't want to make the ancestor much
weaker than they are at present, since it's not fun if the
ancestor is weak... though there's probably still some room to
manuever, there.) Easy to theme, too; powering your ancestor with
your life essence...

Frail 2 might be more dramatic? Not sure.

crawl-ref/source/dat/descript/gods.txt

@@ -62,11 +62,11 @@ afford. Fortunately, Gozag's worshippers are said to have the touch of gold.
 Hepliaklqana
 
 Hepliaklqana the Forgotten accepts the worship of those who would remember
-their forebears, and fight alongside the greatest of them all. Hepliaklqana
-demands only that followers explore and form new experiences; as they advance
-in this service, they will find themselves able to shape and control their
-ancestor's memory, eventually bringing them into the ranks of the mythical
-heroes.
+their forebears, and fight alongside the greatest of them all. Acolytes of
+Hepliaklqana sacrifice a small part of their life essence to manifest their
+ancestor into the world; as they explore and form new experiences, they will
+find themselves able to shape and control their ancestor's memory, eventually
+bringing them into the ranks of the mythical heroes.
 %%%%
 Jiyva
 
@@ -280,14 +280,15 @@ entire branches.
 %%%%
 Hepliaklqana powers
 
-Hepliaklqana's worshippers are served by a guardian formed from their memories
-of their greatest ancestor. This ancestor is at first remembered as they were
-at the start of their fabled adventures, but will advance in skill as their
-descendant does. Hepliaklqana always allows followers to recall their ancestor
-to their side, and, even if the ancestor is destroyed, Hepliaklqana will call
-it forth again not long after. Further advancement in Hepliaklqana's service
-allows worshippers to restore and strengthen their ancestor, to swap them with
-other creatures, and to choose how to remember their life's talents.
+Hepliaklqana's worshippers are served by a guardian formed a part of their life
+essence, in the shape of their greatest ancestor. This ancestor is at first
+remembered as they were at the start of their fabled adventures, but will
+advance in skill as their descendant does. Hepliaklqana always allows followers
+to recall their ancestor to their side, and, even if the ancestor is destroyed,
+Hepliaklqana will call it forth again not long after. Further advancement in
+Hepliaklqana's service allows worshippers to restore and strengthen their
+ancestor, to swap them with other creatures, and to choose how to remember
+their life's talents.
 %%%%
 Jiyva powers
 
@@ -512,8 +513,9 @@ Hepliaklqana wrath
 Hepliaklqana believes that the only reasonable punishment for turning one's
 back on the path of memory is to be denied its use. All new experience is
 denied to the unfortunate apostate, until Hepliaklqana decides they have
-been punished enough. This will not be quick: unlike some, Hepliaklqana has
-a long memory...
+been punished enough. The life essence sacrificed to manifest an ancestor will
+not be returned until Hepliaklqana is mollified, and this will not be quick:
+unlike some, Hepliaklqana has a long memory.
 %%%%
 Gozag wrath
 

crawl-ref/source/godpassive.cc

@@ -283,7 +283,10 @@ static const vector<god_passive> god_passives[NUM_GODS] =
     { },
 
     // Hepliaklqana
-    { {  5, passive_t::transfer_drain, "drain nearby creatures when transferring your ancestor" }, },
+    {
+        { -1, passive_t::frail, "GOD siphons a part of your essence into your ancestor" },
+        {  5, passive_t::transfer_drain, "drain nearby creatures when transferring your ancestor" },
+    },
 };
 
 bool have_passive(passive_t passive)

crawl-ref/source/godpassive.h

@@ -242,6 +242,9 @@ enum class passive_t
 
     /// Hep's transfer drains enemies adjacent to the effect's target
     transfer_drain,
+
+    /// Hep reduces your max HP
+    frail,
 };
 
 enum ru_interference

crawl-ref/source/player.cc

@@ -4138,12 +4138,16 @@ int get_real_hp(bool trans, bool rotted)
     hitp *= 10 + species_hp_modifier(you.species);
     hitp /= 10;
 
+    const bool hep_frail = have_passive(passive_t::frail)
+                          || player_under_penance(GOD_HEPLIAKLQANA);
+
     // Mutations that increase HP by a percentage
     hitp *= 100 + (player_mutation_level(MUT_ROBUST) * 10)
                 + (you.attribute[ATTR_DIVINE_VIGOUR] * 5)
                 + (player_mutation_level(MUT_RUGGED_BROWN_SCALES) ?
                    player_mutation_level(MUT_RUGGED_BROWN_SCALES) * 2 + 1 : 0)
-                - (player_mutation_level(MUT_FRAIL) * 10);
+                - (player_mutation_level(MUT_FRAIL) * 10)
+                - (hep_frail ? 10 : 0);
 
     hitp /= 100;
 

crawl-ref/source/religion.cc

@@ -564,11 +564,18 @@ void dec_penance(god_type god, int val)
                      mi->del_ench(ENCH_AWAKEN_FOREST);
             }
         }
-        else if (god == GOD_PAKELLAS)
+        else
         {
-            // Penance just ended w/o worshipping Pakellas;
-            // notify the player that MP regeneration will start again.
-            mprf(MSGCH_GOD, god, "You begin regenerating magic.");
+            if (god == GOD_PAKELLAS)
+            {
+                // Penance just ended w/o worshipping Pakellas;
+                // notify the player that MP regeneration will start again.
+                mprf(MSGCH_GOD, god, "You begin regenerating magic.");
+            } else if (god == GOD_HEPLIAKLQANA)
+            {
+                calc_hp(); // frailty ends
+                mprf(MSGCH_GOD, god, "Your full life essence returns.");
+            }
         }
     }
     else if (god == GOD_NEMELEX_XOBEH && you.penance[god] > 100)
@@ -3398,11 +3405,13 @@ static void _join_hepliaklqana()
                                                          : GENDER_MALE;
     }
 
+    calc_hp(); // adjust for frailty
+
     // Complimentary ancestor upon joining.
     const mgen_data mg = hepliaklqana_ancestor_gen_data();
     delayed_monster(mg);
-    simple_god_message(make_stringf(" brings forth the memory of your ancestor,"
-                                    " %s!",
+    simple_god_message(make_stringf(" forms a fragment of your life essence"
+                                    " into the memory of your ancestor, %s!",
                                     mg.mname.c_str()).c_str());
 }