Silver Banshee

A frequent enemy of Superman and Supergirl, her "Death Wail" can immediately kill anyone she knows the identity of. She is the executioner of Man.

Silver Banshee is a super-villain with sonic powers and an enemy to Superman. Her family occupies Castle Broen on an island between Ireland and Scotland, where her father was the patriarch of their clan. During a conflict for leadership through supernatural forces, Siobhan McDougal was dragged into the netherworld and granted powers by a creature called the Crone.

Sliver Banshee possesses an array of superhuman attributes which includes superhuman strength, speed, stamina and endurance. She has also a high resistance towards physical and energy attacks. Sliver Banshee also has a sonic scream which can kill anyone who hears it as long as she knows their true identity. She also uses her sonic scream for other purposes, her teleportation is an example of this. She's shown to master any form of language even animal communication with minimal exposure. However she always speaks with a strong Irish accent.

She has the appearance of a black and white banshee.