diff --git a/common/game_data/scripts/run/run_data.gd b/common/game_data/scripts/run/run_data.gd
index 289afac..59a91c9 100644
--- a/common/game_data/scripts/run/run_data.gd
+++ b/common/game_data/scripts/run/run_data.gd
@@ -18,6 +18,8 @@ var run_seed = randi()
         current_run_point_changed.emit(v)
 @export var visited_run_points : Array[RunPoint] = []
 
+@export var last_used_modifier_name = ""
+
 #region ------------------ Generation ------------------
 
 func generate_next_run_points(level = 0) -> Array[RunPoint]:
@@ -36,7 +38,7 @@ func generate_next_run_point(level = 0) -> RunPoint:
     var region_parameter = RegionParameter.new()
     region_parameter.level = level
     region_parameter.region_flags = get_region_flags(region_parameter)
-
+    region_parameter.modifiers = get_region_modifiers(level + 1)
 
     return RunPoint.new(
         level,
@@ -64,6 +66,8 @@ func choose_next_run_point(run_point : RunPoint) -> RunPoint:
     current_run_point = run_point
     GameInfo.game_data.start_region(run_point.region_parameter)
     next_run_points = generate_next_run_points(current_run_point.level + 1)
+    if len(current_run_point.region_parameter.modifiers):
+        last_used_modifier_name = current_run_point.region_parameter.modifiers[0].get_modifier_name()
     return current_run_point
 
 func get_region_flags(region_parameter : RegionParameter) -> Array[String]:
@@ -73,3 +77,21 @@ func get_region_flags(region_parameter : RegionParameter) -> Array[String]:
         flags.append("borea")
     
     return flags
+
+func get_region_modifiers(level : int) -> Array[RegionModifier]:
+    var possible_modifiers : Array[RegionModifier] = [
+        AridModifier.new(level),
+        HumidModifier.new(level),
+        PoorModifier.new(level),
+        HarshModifier.new(level)
+    ]
+
+    possible_modifiers = possible_modifiers.filter(
+        func (m): return m.get_modifier_name() != last_used_modifier_name
+    )
+
+    var choosen_modifier : RegionModifier = possible_modifiers.pick_random()
+
+    last_used_modifier_name = choosen_modifier.get_modifier_name()
+
+    return [choosen_modifier]