<UserControl.Resources>
		<ResourceDictionary>
			<Storyboard x:Key="CooldownStoryboard">
				<DoubleAnimation Duration="0" To="1" Storyboard.TargetProperty="(UIElement.Opacity)" Storyboard.TargetName="Darken" From="1"/>
			</Storyboard>
		</ResourceDictionary>
	</UserControl.Resources>

	<i:Interaction.Triggers>
		<ei:StoryboardCompletedTrigger Storyboard="{StaticResource CooldownStoryboard}">
			<ei:PlaySoundAction Source="play_hud_cooldown_complete.wav"/>
		</ei:StoryboardCompletedTrigger>
	</i:Interaction.Triggers>
	
	<Grid x:Name="Root" HorizontalAlignment="Center" VerticalAlignment="Center" Margin="2,0,3,0">
		<VisualStateManager.VisualStateGroups>
            <VisualStateGroup x:Name="AbilityStates">
                <VisualStateGroup.Transitions>
                    <VisualTransition From="Ready" GeneratedDuration="0" To="Cooldown" Storyboard="{StaticResource CooldownStoryboard}">
                        <VisualTransition.GeneratedEasingFunction>
                            <CircleEase EasingMode="EaseOut"/>
                        </VisualTransition.GeneratedEasingFunction>
                    </VisualTransition>
// ....