diff --git a/src/uni2ts/model/moirai/__init__.py b/src/uni2ts/model/moirai/__init__.py
index 341b734..bb9623f 100644
--- a/src/uni2ts/model/moirai/__init__.py
+++ b/src/uni2ts/model/moirai/__init__.py
@@ -16,6 +16,8 @@
 from .finetune import MoiraiFinetune
 from .forecast import MoiraiForecast
 from .module import MoiraiModule
+from .multi_scale_finetune import MoiraiMultiScaleFinetune
+from .multi_scale_forecast import MultiScaleMoiraiForecast
 from .pretrain import MoiraiPretrain
 
-__all__ = ["MoiraiFinetune", "MoiraiForecast", "MoiraiModule", "MoiraiPretrain"]
+__all__ = ["MoiraiFinetune", "MoiraiForecast", "MoiraiModule", "MoiraiMultiScaleFinetune", "MultiScaleMoiraiForecast", "MoiraiPretrain"]
diff --git a/src/uni2ts/transform/__init__.py b/src/uni2ts/transform/__init__.py
index 2e78ec6..349c201 100644
--- a/src/uni2ts/transform/__init__.py
+++ b/src/uni2ts/transform/__init__.py
@@ -18,6 +18,12 @@
 from .feature import AddObservedMask, AddTimeIndex, AddVariateIndex
 from .field import LambdaSetFieldIfNotPresent, RemoveFields, SelectFields, SetValue
 from .imputation import DummyValueImputation, ImputeTimeSeries, LastValueImputation
+from .multi_scale import (
+    AddNewFreqScaleSeries,
+    AddNewScaleSeries,
+    MultiScaleMaskedPredictionGivenFixedConfig,
+    PadNewScaleSeries,
+)
 from .pad import EvalPad, MaskOutRangePaddedTokens, Pad, PadFreq
 from .patch import (
     DefaultPatchSizeConstraints,
@@ -43,6 +49,8 @@
 )
 
 __all__ = [
+    "AddNewScaleSeries",
+    "AddNewFreqScaleSeries",
     "AddObservedMask",
     "AddTimeIndex",
     "AddVariateIndex",
@@ -64,10 +72,12 @@
     "MaskedPrediction",
     "MaskedPredictionGivenFixedConfig",
     "MaskOutRangePaddedTokens",
+    "MultiScaleMaskedPredictionGivenFixedConfig",
     "PackCollection",
     "PackFields",
     "Pad",
     "PadFreq",
+    "PadNewScaleSeries",
     "PatchCrop",
     "PatchCropGivenFixedConfig",
     "PatchSizeConstraints",
diff --git a/src/uni2ts/transform/_mixin.py b/src/uni2ts/transform/_mixin.py
index c723a58..00577b2 100644
--- a/src/uni2ts/transform/_mixin.py
+++ b/src/uni2ts/transform/_mixin.py
@@ -121,3 +121,18 @@ def check_ndim(self, name: str, arr: np.ndarray, expected_ndim: int):
                 f"has expected ndim: {expected_ndim}, "
                 f"but got ndim: {arr.ndim} of shape {arr.shape}."
             )
+
+
+class AddNewArrMixin:
+    @staticmethod
+    def apply_func(
+        func: Callable[[dict[str, Any], str], np.ndarray],
+        data_entry: dict[str, Any],
+        fields: tuple[str, ...],
+        optional_fields: tuple[str, ...] = (),
+    ):
+        for field in fields:
+            return func(data_entry, field)
+        for field in optional_fields:
+            if field in data_entry:
+                func(data_entry, field)