From A Song of Ice and Fire : TMG Wiki
Tactics Card Details
|Commander||Greatjon Umber - Lord Of Last Hearth|
|When a friendly unit makes a Melee Attack, after Attack dice are rolled :
The defender suffers D3 Wounds. After this attack is completed, unless this unit only has 1 remaining rank, it suffers that many Wounds as well.
If this is a House Umber unit, you may deal 3 Wounds instead of rolling.