Black Flashed

Season 5 episode 1 of Nightwing & Batgirl.
== Plot ==
Nightwing, Batgirl, and the Outsiders battled the Royal Flush Gang while they are on their bank heist. Nightwing and Black Lightning battled Jack, Geo-Force and Halo battled King, Batgirl battled Queen, Metamorpho battled Ten, and Katana battled Ace. After a short battle, the Royal Flush Gang were sent to the police. Nightwing and Batgirl now bid farewell to the Outsiders after the team-up. 
The scene moves to the Black Flash emerging from the Speed-Force, finding himself at Central City. Max Mercury, one of the Speedsters, had died due to old age, and he came to retrieve his body. But, after bringing him to the afterlife, he was pulled outside the Speed-Force. He is out on a search for his purpose. Once he realizes his purpose, that's the only way he'll be able to return to the Speed-Force. Soon, he crosses paths with Barry Allen, who chased him. Black Flash kept running away. Later, Barry was able to chase him down and pinned him on the ground. 
"Hey, could you please stop for a while? You seem lost. I'm here to help.", Barry told the Black Flash.
"I don't think you can help me. Only I can know my purpose.", the Black Flash replied, as he vibrated his body, sending Flash away flying. He continued running. 
Flash rose up after a bad fall and said, "Alright, this is getting serious now. I gotta go get him before he harms any... Woah! He's gone!". He was surprised that Black Flash already got away. 
Now, he went to his lab and called Kid Flash and Geezer Flash. He told them the whole incident. 
"Cool", Kid Flash said.
"It's cool and all, until he causes destruction to our city", Flash said.
"This seems very serious.", Geezer Flash replied.
"He's on a search for his purpose, and he told me he's the only one who can figure himself out. I've known him before. He serves as Death for the Speedsters. But he shouldn't have been able to get to our world. Speedsters usually are too fast for him to capture.", Flash said.
"What if he decided it's judgment day for us speedsters?", Kid Flash asked.
"That, exactly, we need to investigate. That's why we need to hunt him down.", Flash answered. 
Barry decided to call and ask Nightwing and Batgirl's help on the Black Flash incident. Nightwing and Batgirl went to Flash's lab immediately. There, Barry explains how he came to know the Black Flash. 
"You know my invention right? The all-powerful Cosmic Treadmill. I've experimented on it from time to time, being able to travel through millions of alternate universes. The Treadmill allows me to control the Speed-Force. However, even for me, its too powerful to handle. Almost had a near-death experience once. That's when I met the Black Flash. He serves as Death for the Speed-Force, bringing us to the afterlife. But his existence is doubted, because Speedsters had always been too quick for him to capture. But what bothers me is how he's managed to get to our world. He must be out to bring judgment for all Speedsters. Or something else. He said he's on a search for his purpose. We don't know. That's why we must find him. And help him find his purpose. Or get the answers to our questions.", Barry explained them.
"
== Characters ==
=== Major Characters: ===
* Nightwing
* Batgirl
* Flash
* Kid Flash
* Geezer Flash
* Black Flash
==== The Outsiders: ====
* Black Lightning
* Geo-Force
* Halo
* Metamorpho
* Katana
==== Other: ====
* Max Mercury-the Golden Age Flash who recently died; his soul was guided by Black Flash to the afterlife.
* Iris West-Barry Allen's lover.
=== Villains: ===
==== Royal Flush Gang: ====
* Jack
* King
* Queen
* Ten
* Ace