diff --git a/app/models/collection_artifact.rb b/app/models/collection_artifact.rb
index 1c7b75b..35f43fb 100644
--- a/app/models/collection_artifact.rb
+++ b/app/models/collection_artifact.rb
@@ -38,6 +38,7 @@ class CollectionArtifact < ApplicationRecord
   validates :nickname, length: { maximum: 50 }, allow_blank: true
   validates :proficiency, presence: true, if: :quirk_artifact?
   validates :proficiency, absence: true, unless: :quirk_artifact?
+  validates :reroll_slot, inclusion: { in: 1..4 }, allow_nil: true
 
   # Scopes
   scope :by_element, ->(el) { where(element: el) }
diff --git a/app/models/grid_artifact.rb b/app/models/grid_artifact.rb
index 77a8db7..e6ef66f 100644
--- a/app/models/grid_artifact.rb
+++ b/app/models/grid_artifact.rb
@@ -40,6 +40,7 @@ class GridArtifact < ApplicationRecord
   validates :level, presence: true, inclusion: { in: 1..5 }
   validates :proficiency, presence: true, if: :quirk_artifact?
   validates :proficiency, absence: true, unless: :quirk_artifact?
+  validates :reroll_slot, inclusion: { in: 1..4 }, allow_nil: true
 
   validate :validate_character_compatibility
 
diff --git a/db/migrate/20251203211939_add_reroll_slot_to_artifacts.rb b/db/migrate/20251203211939_add_reroll_slot_to_artifacts.rb
new file mode 100644
index 0000000..93142c9
--- /dev/null
+++ b/db/migrate/20251203211939_add_reroll_slot_to_artifacts.rb
@@ -0,0 +1,8 @@
+# frozen_string_literal: true
+
+class AddRerollSlotToArtifacts < ActiveRecord::Migration[8.0]
+  def change
+    add_column :collection_artifacts, :reroll_slot, :integer
+    add_column :grid_artifacts, :reroll_slot, :integer
+  end
+end
diff --git a/db/schema.rb b/db/schema.rb
index 843ac3b..76d973a 100644
--- a/db/schema.rb
+++ b/db/schema.rb
@@ -10,7 +10,7 @@
 #
 # It's strongly recommended that you check this file into your version control system.
 
-ActiveRecord::Schema[8.0].define(version: 2025_12_03_195857) do
+ActiveRecord::Schema[8.0].define(version: 2025_12_03_211939) do
   # These are extensions that must be enabled in order to support this database
   enable_extension "btree_gin"
   enable_extension "pg_catalog.plpgsql"
@@ -150,6 +150,7 @@ ActiveRecord::Schema[8.0].define(version: 2025_12_03_195857) do
     t.jsonb "skill4", default: {}, null: false
     t.datetime "created_at", null: false
     t.datetime "updated_at", null: false
+    t.integer "reroll_slot"
     t.index ["artifact_id"], name: "index_collection_artifacts_on_artifact_id"
     t.index ["element"], name: "index_collection_artifacts_on_element"
     t.index ["user_id", "artifact_id"], name: "index_collection_artifacts_on_user_id_and_artifact_id"
@@ -298,6 +299,7 @@ ActiveRecord::Schema[8.0].define(version: 2025_12_03_195857) do
     t.jsonb "skill4", default: {}, null: false
     t.datetime "created_at", null: false
     t.datetime "updated_at", null: false
+    t.integer "reroll_slot"
     t.index ["artifact_id"], name: "index_grid_artifacts_on_artifact_id"
     t.index ["grid_character_id"], name: "index_grid_artifacts_on_grid_character_id", unique: true
   end