I have a problem, i was play Dwarves and my oponent play Dark Elves.

He was play a [whi]Take Captive[/whi] on my Dwarf unit with [whi]Rune of Cleaving[/whi], he take control on my unit to end of the turn and imediatly sacrefice this unit from action from [whi]Slave Pen[/whi]. My unit is destroyed i do know, but can i play action from [whi]Rune of Cleaving[/whi] to go back this card to my hand ?

Yes.

He took control of the unit, and the attachment went with the unit, but you still control the attachment. You couldn't make it stop giving the unit additional power, but you can pay to return it to your hand.

thx