If your superheroing in or around the Metropolis area you may be unfortunate enough to run across her. So Supeheroing 101 is here to give you the 411 on how to survive an encounter with the Banshee.
The most important thing you need to know about Silver Banshee is that she can kill you simply by screaming your name.
There are a number of ways you can combat a power such as this:
i.) During the battle you could stick your fingers in your ears and sing 'La La La La La' at the top of your voice. Unfortunately this tatic leaves both your hands occupied and you'll find yourself at a distinct disadvantage in the hand to hand combat department.
ii.) A much more effective idea is to not tell Silver Banshee your name. If she doesn't know it, she can't scream it.
Fig 1: Having your name written on your shirt when battling Silver Banshee is not a good strategy
iii.) If the worst happens and Silver Banshee learns your name and attempts to use her death wail the most effective means of stopping her is by gagging her in some way. Shove whatever comes to hand into her mouth before she can scream be it your cape, your belt, a sock or even...a big rig truck.
Fig 2: The truck gagging technique
Here endeth the lesson.
Good luck out there super-heroes!
(This lesson in super-heroics was brought to you by Supergirl #34 wherein Kara vandalises a baseball diamond and runs away then sends some hate mail to the Daily Planet's Cat Grant. Tsk Tsk Tsk, these kids today, I blame the hippety hoppity music.)