update

scripts/enemy/boss.gd

@@ -0,0 +1,5 @@
+extends "res://scripts/enemy/enemy.gd"
+
+func _ready() -> void:
+  super._ready()
+  add_to_group("boss")

scripts/enemy/boss.gd.uid

@@ -0,0 +1 @@
+uid://bkehq3dqyp2yd

scripts/enemy/enemy_aggro.gd

@@ -10,6 +10,7 @@ var seconds_outside := 0.0
 func _ready() -> void:
   EventBus.damage_dealt.connect(_on_damage_dealt)
   EventBus.entity_died.connect(_on_entity_died)
+  EventBus.heal_requested.connect(_on_heal_requested)
 
 func _process(delta: float) -> void:
   var outside_portal := false
@@ -53,6 +54,12 @@ func _on_damage_dealt(attacker: Node, target: Node, amount: float) -> void:
     multiplier = 2.0
   add_aggro(attacker, amount * multiplier)
 
+func _on_heal_requested(healer: Node, _target: Node, amount: float) -> void:
+  if not healer.is_in_group("player"):
+    return
+  if healer in aggro_table:
+    add_aggro(healer, amount * 0.5)
+
 func _on_entity_died(entity: Node) -> void:
   aggro_table.erase(entity)