[quote=supertinyking]
With stine dead, it gave darkside some time. Some time, to take out some filth."You there! Brat, what is your name?" He barks to the man in all golden armor. His voice was horse, but oddly chilling.
[/quote]
You can still save Stein, but you clearly need to get him out of there now. I wouldn't suggest fighting while you can do that.

[quote=thewizardguy]
I know this. However, he wasn't countering God-Killer Resonance, or he would have used it when God-Killer Resonance was used. Instead, he countered Stein's strongest attack, which is Soul Purge, the attack he used to kill Gilgamesh. And he already had his heart ready before he launched that attack.
[/quote]

Like I said, is it "Steins" heart?

[quote]Question? What if the target can survive without a heart?[/quote]

Then they can continue on. In this scenario, Steins body should still be nearly cut in half, since Fragarch leaves a mess. 

However it's "possible" to pull him out of there and for Darkside to bring him back as you had planned. 

For things that are "unkillable", that's what Gae Bolg is for.