diff --git a/engine/player/unique_gear_midnight.cpp b/engine/player/unique_gear_midnight.cpp
index 610c9088260..ee6bdbdd7f5 100644
--- a/engine/player/unique_gear_midnight.cpp
+++ b/engine/player/unique_gear_midnight.cpp
@@ -3385,6 +3385,41 @@ void font_of_venomous_rage( special_effect_t& effect )
   effect.execute_action = create_proc_action<font_channel_t>( "font_of_venemous_rage", effect );
 }
 
+// Vashnik's Sanguine Rancor
+// 1295553 Driver
+// 1303479 Sanguine Rancor (stack buff)
+// 1303483 Crimson Bile (aoe dmg)
+// 1303484 Concentrated Bile (st dot)
+void vashniks_sanguine_rancor( special_effect_t& effect )
+{
+  auto damage = effect.driver()->effectN( 1 ).average( effect );
+
+  auto concentrated_bile = create_proc_action<generic_proc_t>( "concentrated_bile", effect, 1303484 );
+  concentrated_bile->base_td = damage * effect.driver()->effectN( 2 ).percent()
+                              * concentrated_bile->base_tick_time / concentrated_bile->dot_duration;
+  concentrated_bile->base_td_multiplier *= role_mult( effect );
+
+  auto crimson_bile = create_proc_action<generic_aoe_proc_t>( "crimson_bile", effect, 1303483 );
+  crimson_bile->base_dd_min = crimson_bile->base_dd_max = damage;
+  crimson_bile->base_multiplier *= role_mult( effect );
+  crimson_bile->add_child( concentrated_bile );
+
+  effect.custom_buff = create_buff<buff_t>( effect.player, effect.player->find_spell( 1303479 ) )
+    ->set_expire_at_max_stack( true )
+    ->set_expire_callback( [ crimson_bile, concentrated_bile ]( buff_t* b, int stacks, timespan_t ) {
+      // only erupt when the buff was consumed at max stacks, not when expired during combat end
+      if ( stacks < b->max_stack() )
+        return;
+      crimson_bile->set_target( b->player->target );
+      auto n_targets = crimson_bile->target_list().size();
+      crimson_bile->execute_on_target( b->player->target );
+      if ( n_targets == 1 )
+        concentrated_bile->execute_on_target( b->player->target );
+    } );
+
+  new dbc_proc_callback_t( effect.player, effect );
+}
+  
 // Stormbound Emblem of Dazar
 // 1295275 on-use driver (The King's Unyielding Wind), 2 sec channel ticking every 0.5 sec
 // 1294744 equip
@@ -4546,6 +4581,7 @@ void register_special_effects()
   register_special_effect( 1297760, DISABLED_EFFECT ); // Voracious Heart of Ula'tek equip driver
   register_special_effect( 1295275, trinkets::stormbound_emblem_of_dazar );
   register_special_effect( 1294744, DISABLED_EFFECT );  // Stormbound Emblem of Dazar equip driver
+  register_special_effect( 1295553, trinkets::vashniks_sanguine_rancor );
   reset_version_check();
   // Weapons
   register_special_effect( { 1253357, 1253359 }, weapons::torments_duality );  // umbral sabre & radiant foil