|Powers||Kills angels and capable of inflicting unhealable wounds.|
|Episodes|| 10.20 Angel Heart|
11.12 Don't You Forget About Me
As the weapon seems to be simply a sword version of the angel blade, presumably it can kill anything the angel blade can such as angels, demons, hellhounds, and reapers. Each Grigori have their names inscribed on the swords. Wounds made by the sword cannot be healed by regular angels.
After discovering that Ronnie Cartwright has told a couple of hunters about him, Tamiel blinds Ronnie with his powers and then stabs him through the back with his angel sword, killing him. While examining the body, Castiel tells Dean and Claire Novak that the wound is like that of an angel blade but is larger and he is unable to identify the marks the hilt of the sword made around the wound. Dean later realizes that they are dealing with an angel sword instead of an angel blade and it allows him and Claire to identify Tamiel as a Grigori.
When Claire fails to kill him with a gun, Tamiel pulls out his sword and tries to kill her with it, but her mother sacrifices herself to save her. When Sam, Dean and Castiel engage him in battle, Tamiel loses the sword though he still proves too strong for the three even without it. Before Tamiel can kill them, Claire grabs his sword and stabs him through the back with it, killing him. She then drops the sword to embrace her mother's body.
The next day, Dean reveals that he is aware that Claire kept Tamiel's angel sword to become a hunter herself and warns her against that path, but gives her a lore book on angels so she'll know what she's doing if she chooses that path.