I believe it is the secret of his power.

And this is the real secret of South Korea's power.

It is the secret of my power and, to a degree, your own.

One secret of their power is their mutual good understanding.

This was the secret of their power, even Ivar in his madness knew it.

The secret of her power is such that she leaches the life force from living creatures.

The secret of his power is that he doesn't exist for himself.

Is that the true secret of their mind glow's power?

You must know the secret of their power.

I did not understand the secret of the sword's power when it was made known to me at the Hadeshorn.