How to access a storyboard within an element resources from XAML?

Consider this code:

<UserControl x:Class="MyApp.MyControl"
                ...
	        xmlns:local="clr-namespace:MyApp"
	        DataContext="{Binding RelativeSource={RelativeSource Mode=Self}}"><UserControl.Template><ControlTemplate><ControlTemplate.Resources><Storyboard x:Key="MyStory"><ColorAnimationUsingKeyFrames Storyboard.TargetProperty="(Border.BorderBrush).(SolidColorBrush.Color)" Storyboard.TargetName="brdBase"><SplineColorKeyFrame KeyTime="0:0:1" Value="Red"/></ColorAnimationUsingKeyFrames></Storyboard></ControlTemplate.Resources><Border x:Name="brdBase" BorderThickness="1" BorderBrush="Cyan" Background="Black">
                ...</Border><ControlTemplate.Triggers><Trigger SourceName="brdBase" Property="IsMouseOver" Value="True"><Trigger.EnterActions><BeginStoryboard Storyboard="{StaticResource MyStory}"/></Trigger.EnterActions></Trigger></ControlTemplate.Triggers></ControlTemplate></UserControl.Template></UserControl>

The above code works with no problem. Now, I wanna bind key-frame value of MyStory to a DP (named SpecialColor) of this user-control like so:

<Storyboard x:Key="MyStory"><ColorAnimationUsingKeyFrames Storyboard.TargetProperty="(Border.BorderBrush).(SolidColorBrush.Color)" Storyboard.TargetName="brdBase"><SplineColorKeyFrame KeyTime="0:0:1" Value="{Binding RelativeSource={RelativeSource Mode=FindAncestor, AncestorType={x:Type local:MyControl}}, Path=SpecialColor}"/></ColorAnimationUsingKeyFrames></Storyboard>

which makes an error:

Cannot freeze this Storyboard timeline tree for use across threads.

It's possible to do this using code behind. But how can I do it in XAML only?

__________________________
Code-Behind Aided Solution:

►Step 1: Putting the MyStory storyboard into the brdBase resources.

<UserControl.Template><ControlTemplate><Border x:Name="brdBase" BorderThickness="1" BorderBrush="Cyan" Background="Black"><Border.Resources><Storyboard x:Key="MyStory"><ColorAnimationUsingKeyFrames Storyboard.TargetProperty="(Border.BorderBrush).(SolidColorBrush.Color)" Storyboard.TargetName="brdBase"><SplineColorKeyFrame KeyTime="0:0:1" Value="{Binding RelativeSource={RelativeSource Mode=FindAncestor, AncestorType={x:Type local:MyControl}}, Path=SpecialColor}"/></ColorAnimationUsingKeyFrames></Storyboard></Border.Resources>
            ...</Border><ControlTemplate.Triggers><Trigger SourceName="brdBase" Property="IsMouseOver" Value="True"><Trigger.EnterActions><BeginStoryboard Storyboard="{StaticResource MyStory}"/></Trigger.EnterActions></Trigger></ControlTemplate.Triggers></ControlTemplate></UserControl.Template>

Error:Cannot find resource named 'MyStory'. Resource names are case sensitive.

►Step 2: Eliminating Trigger on IsMouseOver property and begin theMyStory from code behind.

<UserControl.Template><ControlTemplate><Border x:Name="brdBase" BorderThickness="1" BorderBrush="Cyan" Background="Black" MouseEnter="brdBase_MouseEnter"><Border.Resources><Storyboard x:Key="MyStory"><ColorAnimationUsingKeyFrames Storyboard.TargetProperty="(Border.BorderBrush).(SolidColorBrush.Color)" Storyboard.TargetName="brdBase"><SplineColorKeyFrame KeyTime="0:0:1" Value="{Binding RelativeSource={RelativeSource Mode=FindAncestor, AncestorType={x:Type local:MyControl}}, Path=SpecialColor}"/></ColorAnimationUsingKeyFrames></Storyboard></Border.Resources></Border></ControlTemplate></UserControl.Template>

C# Code-Behind:

private void brdBase_MouseEnter(object sender, MouseEventArgs e)
{
    Border grdRoot = (Border)this.Template.FindName("brdBase", this);
    Storyboard story = grdRoot.Resources["MyStory"] as Storyboard;

    story.Begin(this, this.Template);
}

►Step 3: The solution is already done, but it doesn't work at the first time. Fortunately, there is a workaround for this issue. It's enough to put theControlTemplate in a Style.

(I need other Trigger types than EventTrigger and must wrap theUserControl elements with the ControlTemplate.)

______________________

Using ObjectDataProvider:

I  also tried to use ObjectDataProvider, but it failed.

1. An ObjectDataProvider resource cannot be used to provide a storyboard!!! The error report is:
   • XamlParseException: Set property 'System.Windows.Media.Animation.BeginStoryboard.Storyboard' threw an exception.
   • InnerException: 'System.Windows.Data.ObjectDataProvider' is not a valid value for property 'Storyboard'.
2. The AssociatedControl DP is always null.

Here is the code:

<UserControl.Template><ControlTemplate><ControlTemplate.Resources><local:StoryboardFinder x:Key="StoryboardFinder1" AssociatedControl="{Binding ElementName=brdBase}"/><ObjectDataProvider x:Key="dataProvider" ObjectInstance="{StaticResource StoryboardFinder1}" MethodName="Finder"><ObjectDataProvider.MethodParameters><sys:String>MyStory</sys:String></ObjectDataProvider.MethodParameters></ObjectDataProvider></ControlTemplate.Resources><Border x:Name="brdBase" BorderThickness="1" BorderBrush="Cyan" Background="Black"><Border.Resources><Storyboard x:Key="MyStory"><ColorAnimationUsingKeyFrames Storyboard.TargetProperty="(Border.BorderBrush).(SolidColorBrush.Color)" Storyboard.TargetName="brdBase"><SplineColorKeyFrame KeyTime="0:0:1" Value="{Binding RelativeSource={RelativeSource Mode=FindAncestor, AncestorType={x:Type local:MyControl}}, Path=SpecialColor}"/></ColorAnimationUsingKeyFrames></Storyboard></Border.Resources>
            ...</Border><ControlTemplate.Triggers><Trigger SourceName="brdBase" Property="IsMouseOver" Value="True"><Trigger.EnterActions><BeginStoryboard Storyboard="{StaticResource dataProvider}"/></Trigger.EnterActions></Trigger></ControlTemplate.Triggers></ControlTemplate></UserControl.Template>

The StoryboardFinder class:

public class StoryboardFinder : DependencyObject
{
    #region ________________________________________  AssociatedControl

    public Control AssociatedControl
    {
        get { return (Control)GetValue(AssociatedControlProperty); }
        set { SetValue(AssociatedControlProperty, value); }
    }

    public static readonly DependencyProperty AssociatedControlProperty =
        DependencyProperty.Register("AssociatedControl",
                                    typeof(Control),
                                    typeof(StoryboardFinder),
                                    new FrameworkPropertyMetadata(null, FrameworkPropertyMetadataOptions.None));

    #endregion

    public Storyboard Finder(string resourceName)
    {
        //
        // Associated control is always null :(
        //
        return new Storyboard();
    }
}