[Gear] Heart of Ancient Hunger initial implementation

Author: nyterage

engine/player/unique_gear_midnight.cpp

@@ -902,6 +902,27 @@ void light_company_guidon( special_effect_t& effect )
   effect.custom_buff = buff;
 }
 
+// Heart of Ancient Hunger
+// 1251822 Driver
+// 1262753 Buff
+void heart_of_ancient_hunger( special_effect_t& effect )
+{
+  struct heart_of_ancient_hunger_buff_t : public stat_buff_t
+  {
+    heart_of_ancient_hunger_buff_t( player_t* p, std::string_view n, const spell_data_t* s, const special_effect_t& e )
+      : stat_buff_t( p, n, s )
+    {
+      set_stat_from_effect_type( A_MOD_RATING, e.driver()->effectN( 1 ).average( e ) / data().duration().total_seconds() );
+      set_reverse( true );
+      set_max_stack( as<int>( data().duration().total_seconds() ) );
+    }
+  };
+
+  effect.custom_buff = create_buff<heart_of_ancient_hunger_buff_t>( effect.player, effect.driver()->effectN( 1 ).trigger(), effect );
+
+  new dbc_proc_callback_t( effect.player, effect );
+}
+
 }  // namespace trinkets
 
 namespace weapons
@@ -1135,6 +1156,7 @@ void register_special_effects()
   register_special_effect( 1250564, trinkets::resonant_roarstone );
   register_special_effect( 1256790, trinkets::undreamt_gods_oozing_vestige );
   register_special_effect( 1251817, trinkets::light_company_guidon );
+  register_special_effect( 1251822, trinkets::heart_of_ancient_hunger );
   // Weapons
   register_special_effect( { 1253357, 1253359 }, weapons::torments_duality );  // umbral sabre & radiant foil
   // Armor