diff --git a/lib/tasks/gacha.rake b/lib/tasks/gacha.rake
new file mode 100644
index 0000000..64f1551
--- /dev/null
+++ b/lib/tasks/gacha.rake
@@ -0,0 +1,131 @@
+# frozen_string_literal: true
+
+namespace :gacha do
+  desc 'Migrate gacha table data to promotions arrays on weapons and summons'
+  task migrate_promotions: :environment do
+    test_mode = ENV['TEST'] == 'true'
+
+    # Mapping from gacha table boolean columns to PROMOTIONS enum values
+    promotion_mapping = {
+      'premium' => GranblueEnums::PROMOTIONS[:Premium],
+      'classic' => GranblueEnums::PROMOTIONS[:Classic],
+      'classic_ii' => GranblueEnums::PROMOTIONS[:ClassicII],
+      'flash' => GranblueEnums::PROMOTIONS[:Flash],
+      'legend' => GranblueEnums::PROMOTIONS[:Legend],
+      'valentines' => GranblueEnums::PROMOTIONS[:Valentine],
+      'summer' => GranblueEnums::PROMOTIONS[:Summer],
+      'halloween' => GranblueEnums::PROMOTIONS[:Halloween],
+      'holiday' => GranblueEnums::PROMOTIONS[:Holiday],
+      'collab' => GranblueEnums::PROMOTIONS[:Collab]
+    }
+
+    weapons_updated = 0
+    summons_updated = 0
+    errors = []
+
+    # Query all gacha records
+    gacha_records = ActiveRecord::Base.connection.execute('SELECT * FROM gacha')
+
+    gacha_records.each do |record|
+      # Build promotions array from boolean flags
+      promotions = []
+      promotion_mapping.each do |column, value|
+        promotions << value if record[column] == true
+      end
+
+      drawable_type = record['drawable_type']
+      drawable_id = record['drawable_id']
+
+      if test_mode
+        puts "#{drawable_type} #{drawable_id}: #{promotions.inspect}"
+        if drawable_type == 'Weapon'
+          weapons_updated += 1
+        else
+          summons_updated += 1
+        end
+        next
+      end
+
+      begin
+        if drawable_type == 'Weapon'
+          weapon = Weapon.find_by(id: drawable_id)
+          if weapon
+            weapon.update_column(:promotions, promotions)
+            weapons_updated += 1
+          else
+            errors << "Weapon not found: #{drawable_id}"
+          end
+        elsif drawable_type == 'Summon'
+          summon = Summon.find_by(id: drawable_id)
+          if summon
+            summon.update_column(:promotions, promotions)
+            summons_updated += 1
+          else
+            errors << "Summon not found: #{drawable_id}"
+          end
+        end
+      rescue StandardError => e
+        errors << "Error updating #{drawable_type} #{drawable_id}: #{e.message}"
+      end
+    end
+
+    puts "Weapons updated: #{weapons_updated}"
+    puts "Summons updated: #{summons_updated}"
+    puts "Errors: #{errors.count}"
+    errors.each { |e| puts "  - #{e}" } if errors.any?
+    puts "(TEST MODE - no changes made)" if test_mode
+  end
+
+  desc 'Verify migration by comparing gacha table to promotions arrays'
+  task verify_migration: :environment do
+    promotion_mapping = {
+      'premium' => GranblueEnums::PROMOTIONS[:Premium],
+      'classic' => GranblueEnums::PROMOTIONS[:Classic],
+      'classic_ii' => GranblueEnums::PROMOTIONS[:ClassicII],
+      'flash' => GranblueEnums::PROMOTIONS[:Flash],
+      'legend' => GranblueEnums::PROMOTIONS[:Legend],
+      'valentines' => GranblueEnums::PROMOTIONS[:Valentine],
+      'summer' => GranblueEnums::PROMOTIONS[:Summer],
+      'halloween' => GranblueEnums::PROMOTIONS[:Halloween],
+      'holiday' => GranblueEnums::PROMOTIONS[:Holiday],
+      'collab' => GranblueEnums::PROMOTIONS[:Collab]
+    }
+
+    mismatches = []
+    gacha_records = ActiveRecord::Base.connection.execute('SELECT * FROM gacha')
+
+    gacha_records.each do |record|
+      expected_promotions = []
+      promotion_mapping.each do |column, value|
+        expected_promotions << value if record[column] == true
+      end
+
+      drawable_type = record['drawable_type']
+      drawable_id = record['drawable_id']
+
+      actual_promotions = if drawable_type == 'Weapon'
+                            Weapon.find_by(id: drawable_id)&.promotions || []
+                          else
+                            Summon.find_by(id: drawable_id)&.promotions || []
+                          end
+
+      if expected_promotions.sort != actual_promotions.sort
+        mismatches << {
+          type: drawable_type,
+          id: drawable_id,
+          expected: expected_promotions.sort,
+          actual: actual_promotions.sort
+        }
+      end
+    end
+
+    if mismatches.empty?
+      puts "All #{gacha_records.count} records match!"
+    else
+      puts "Found #{mismatches.count} mismatches:"
+      mismatches.each do |m|
+        puts "  #{m[:type]} #{m[:id]}: expected #{m[:expected]}, got #{m[:actual]}"
+      end
+    end
+  end
+end