Many changes

Handle it

player/modifiers/piercing.gd

@@ -0,0 +1,18 @@
+class_name PiercingModifier extends Modifier
+
+@export var pierce_count: int = 2
+
+func _init():
+		id = "piercing"
+		display_name = "Piercing Shot"
+		description = "Projectiles pass through %d enemies" % pierce_count
+
+func modify_projectile(projectile):
+		projectile.pierce_count = pierce_count
+		projectile.connect("on_hit", _on_projectile_hit)
+    
+func _on_projectile_hit(projectile, _target):
+		projectile.pierce_count -= 1
+		if projectile.pierce_count <= 0:
+			projectile.pierce_count = 0
+			projectile.set_piercing(false)