Unfortunately, this was all a mirage. Your focused dark flame blast failed and his precog was just his delusion because those aren't the REAL darkness, gravity, fire, and time stones. Those are the NEGATIVE darkness, gravity, fire, and time stones. The real ones are in Slifer's tummy. And the only way to get them is to journey to the world of Obelisk the Tormentor and Mega Ultra Chicken and use your hidden power to defeat them, which would somehow make them do a one-time deal of helping you by making Slifer the Executive Producer throw up the original gems.
But more on that later.