Quoting Sully:

Quoting Kelly:

Quoting SuperMatt:

An evil plan indeed. If they cut the planet off from the Sun, Kara loses her powers!

So does Mon-el, unless the Legion ring somehow shields him, and if that is the case, then why don't they go get the Legion ring from the FoS for Supergirl?

I think another question is why don't they wake up the remaining Legion members that are right there to help?

It looks at though somehow Kara ends up in the same alternate universe that Sam was in earlier. If so, it would seem as though that would be the key to defeating Reign. Kill her in the alternate universe, leaving only Sam to exist.

There is an image that the lead actress posted indicating that they do indeed find another person who wears a cape.

Quoting Alex:

Quoting Captain Past:

Quick, Brainiac, we need a set of big mirrors in outer space to power Supergirl up again. We know this is possible because it was one of the Ruler's plots to force the Earth to surrender in an episode of Commando Cody Sky marshal of the Universe.

Each one of the world killers have shown they can take, or at least hold up against Supergirl, even when she has help. If they have her alone I can't see how even if she got her powers back she could turn the tide so it should make for a good nail biter.

We use a lot of mirrors, so there are six suns in the sky, powering up Kara way beyond her usual strength. Of course, there will be voiced concern that she will emulate Overgirl by explodiating herself. However, briefly she is more than a match for the Worldkillers.

Quoting Brierrose:

You’re correct Stewart UV rays do require line of site. I just don’t think an eclipse should suddenly depower Kara. If as you say she’s like a battery and her body stores the solar radiation it absorbs then she should have some reserves. Additionally the DEO has the lamps which I always pictured as emitting intense radiation exactly at the right wavelength so under them Kara heals faster than she would just sitting outside in the sunlight. Finally let’s not forget the yellow sun grenades.

Well, yes - I agree! That's why I said "at some point, they're (Kryptonians) are going to lose their powers (without exposure to yellow sun radiation"). So,I agree that it won't happen immediately.

Quoting Brierrose:

Quoting SuperMatt:

An evil plan indeed. If they cut the planet off from the Sun, Kara loses her powers!

An eclipse shouldn’t depower Kara. Kryptonians and Daxamites get powers from the yellow sun’s radiation, think those UVA and UVB rays we wear sunscreen against, not what’s in the visible light spectrum. If they required wavelengths in the visible spectrum then Kara would lose her powers at night, which we know she doesn't. An unscheduled eclipse would likely cause widespread panic which the Worldkillers could use to thier advantage.

Yes, but there's no ultraviolet radiation from the sun at night, either.UV rays travel "line of sight", just like visible light - so that can't be the explanation. I always thought it was supposed to be like the yellow sun radiation "charged up" the Kryptonians (and Daxamites)- like charging up a battery. And then they were able to store the energy, and keep it in reserve. Isn't that why the DEO put Kara under yellow-sun lamps to charge her up after she was knocked out by Max Lord's "big bomb" and fell in the ocean? If you get rid of the sun's rays, then at some point they're going to lose their powers.
But of course, it's all science fiction (or "fiction science") anyway, so who really knows? ;)

Quoting Kelly:

Quoting SuperMatt:

An evil plan indeed. If they cut the planet off from the Sun, Kara loses her powers!

So does Mon-el, unless the Legion ring somehow shields him, and if that is the case, then why don't they go get the Legion ring from the FoS for Supergirl?

I think another question is why don't they wake up the remaining Legion members that are right there to help?

It looks at though somehow Kara ends up in the same alternate universe that Sam was in earlier. If so, it would seem as though that would be the key to defeating Reign. Kill her in the alternate universe, leaving only Sam to exist.