The duo reappeared on Earth and Natasha looked around, asking "Wakanda?" Ace looked at the sky and replied "This is where I died so I figured, might as well." they looked to the side and saw people rising from the ashes, coming back to life.
Ace grabbed the air and a blue ball of flames appeared on his palm as he said "Well then, it's time." Natasha looked at him and he curled his lips into a grin, staring at her as he held his hand out.
Natasha looked at the flame and touched it.
The flames crawled up into her arm, diving into her chest as she started screaming in pain.
Ace floated in the air, saying "Rise, my Rider!" people who came back to life started looking over, hearing Natasha's screams.
T'Challa ran over quickly, saying "Who are you?!" Ace turned to him, seeing Bucky, the Treeman, Sam, and Pietro following up, looking at Ace with wary expressions.
Ace simply asked "How was the Soul Dimension?" They jumped and frowned "Who?"
Before Natasha fell to her knees, screaming to the sky as her body erupted into flames, melting her skin into bones!
The others were stunned as the screaming slowly stopped.
A new creature stood in front of them, wearing the skin tight combat suit Natasha wore.
It stood up, its head a skull wreathed in orange flames. It grabbed the electric sticks on its back and pulled them out, flicking them to the ground.
They changed from electric batons to flaming Kama, however they looked like mini scythes.
The Creature slashed out and the scythe extended, cutting into the ground before coming back, snapping back into place.
It turned to Ace and said in Natasha's voice "Not too bad." T'Challa and the rest were stunned, "Natasha?!" Natasha turned to them and waved, "Hey guys." Ace rolled his eyes and looked at her saying "Don't stand in the sunlight or you'll go back to normal, but if you're in the shadows you can transform whenever you want. Though, you'll need to train if you want to control it."
He looked at her and continued seriously, "The Spirit of Vengeance is being controlled by me at the moment, but at night without proper training, it will take over your body and punish sinners. I'm not joking, you will unwillingly transform every night until you control your power. You know Johnny Blaze?"
Natasha looked at him and asked "The Motorcycle stunt guy?" Ace nodded and said "He's the one who rebelled against Mephisto. Same thing happened to him before he met an Older Rider… Listen, if you need help, go find him. For now, you won't have any of these issues because I'm keeping it quiet."
Natasha nodded and Ace grabbed her, looking at the rest and saying "See ya." as he engulfed Natasha with his cloak, the duo disappearing into thin air.
T'Challa touched his ear and said "Gather everyone, we have one more fight left!" Pietro ran off instantly.
Ace and Natasha appeared in the air above the Avenger base to see everything destroyed with Thanos and his army behind him.
Steve was the only one standing at the moment, with half a broken shield.
Natasha was stunned and said "Thanos? How??" Ace frowned and sighed "What a headache, he died in the past, why is he back now… Death is gonna be pissed…" before turning to Natasha and asking "You remember Seoul?"
Natasha looked at him in confusion and he waved, a Motorcycle appearing in front of her. She looked at it and said "Ohhh… I get it." Ace warned, "By the way, I forgot to mention, The Spirit of Vengeance is a bit… Show-offy…"
Natasha snorted, "I can handle it." as she got on the Motorcycle in the air, the entire thing morphing into a flaming skeletal motorcycle, Ace waved "Sure you can." as Natasha fell from the sky, plummeting to the ground.
Portals opened up all around Steve as everyone walked through them, standing behind him.
Natasha fell to the ground on the Motorcycle next to Steve as everyone looked at her in shock. She leaned on the handle and tilted her head, saying "Miss me~?" Steve muttered in shock "Nat?! But-" Natasha simply pointed up and everyone looked up to see Ace floating above them, coming down.
Steve tilted his head and Ace said "Don't worry about it, just call it, Steve."
Steve snorted with a smirk, turning to Thanos, who was frowning at the army. Steve held out his hand and shouted "Avengers!"
Ace cracked his neck and Natasha revved the motorcycle as Thor landed behind Steve, who caught Mjolnir, saying "Assemble."
The army roared out a battlecry and charged at Thanos, ships flew out, people were running, flying, etc.
Ace flew out and clenched his fists in the air, massive skeletal arms grabbed the Chitauri space dragons, crushing them into powder, even Scott punched a dragon into the ground!
Natasha drove into the army, taking out one of her flaming scythes and spinning it in the air before whipping it forward, turning aliens to ash! An eerie chuckle escaped her jaws and she popped a wheelie, bouncing the bike onto an alien woman, incinerating her entire head before driving off.
Ace shook his head and spread his hands out, lightning spears dropping from the skies and destroying space dragons one after the other.
Tony flew by and said "Nice one, Skeletor." before blasting out a chest laser and blowing up a ship as he flew off.
Ace scratched his skull and muttered "Damn bastard… Wait till you're dead!" before he flapped his wings, diving down into the Thanos' army, shooting through them with a blue light covering his body as all the aliens froze into sculptures instantly!
He curled up and clapped his hands, spreading them out into the sky as Thanos' enormous ship froze over, falling to the ground, landing on top of his army.
Thanos frowned and turned around, throwing out his double sided sword. It spun like a propeller, shooting towards Ace, who turned around and pinched the sword between two skeletal fingers.
He looked down at Thanos, saying "I liked you better when you were dead." as the sword disappeared and Ace dive bombed Thanos, stomping on him, driving him into the ground, shaking the battlefield.
Ace flew out of the ground, dragging Thanos by his head, throwing him out and pulling his hands apart as a long chain appeared. He threw the chain around Thanos' leg and whipped him back into the ground.
Steve ran over and swung Mjolnir, bouncing Thanos back into the sky as Thor dropped down, slamming his ax into Thanos' back, shooting him into the ground again.
Scott ran up and said "First Serve!" as he kicked Thanos flying.
Tony appeared near Thanos and fired around 7 lasers at him, blowing him back into the sky. Sam flew by and T'Challa jumped off, flipping through the air and dropping his heel, sending Thanos back down, Pietro flashed off the ground and appeared under Thanos instantly, punching him in the stomach sending him back up.
Rhodey flew around him, letting loose all his weapons, blowing a massive explosion in the sky and a red mist blew away the smoke, grabbing Thanos and smashing him into the ground like a meteorite!
Thanos laid on the ground and coughed up a bucket of blood, slowly getting up. He looked up to see Ace, Steve, Thor, Tony, Sam, Rhodey, T'Challa, Wanda, Pietro, and Scott surrounding him.
He wiped his lips and raised his fists, the group was silent and Steve ran at him, swinging up Mjolnir, but Thanos slapped it away, punching Steve flying as he grabbed Thor's neck, blocking Tony's lasers before throwing him at Wanda, sending the both of them flying.
Ace watched as T'Challa punched Thanos in the face before getting slapped into Scott, bringing him to one knee as Thanos grabbed his helmet, smashing his giant head into the ground before kicking out, hitting Pietro right in the stomach, dropping him to the ground as he threw Pietro at Sam and Rhodey in the sky, making them fly away.
However, Natasha flew by on the Motorcycle, nailing Thanos in the head, sending him to one knee as he grabbed the wheel, slamming the motorcycle into the ground, throwing her off.
Tony looked at Ace and said "Anything!?" Ace said speechlessly, "Sorry! I was stunned! That was awesome." as he raised his hands, a black coffin rising from the ground and snapping shut.
The group got back up, groaning as thuds came from the coffin.
Ace felt his spin shiver as he said "This guy… Holy fuck, man." Tony complained "Why didn't you do it sooner! Too amazed that he just kicked our asses all together?" Ace nodded and his lower jaw nearly fell off as he replied "Come on, that was too cool."
Suddenly, the black coffin cracked and Ace shouted, the purple flames in his eye sockets burned in disbelief, "IS THIS GUY SUPERMAN?! THIS IS UNBELIEVABLE!"
He waved his hands and everyone slid back as a supermassive black hole sun peaked from the clouds, outsizing the earth by who knows how many times.
Several dozen magic circles appeared above Thanos' head as he broke the black coffin.
Everyone stopped and looked up in horror as Ace said "Don't worry, It won't destroy the planet… Probably." Tony shouted "Probably isn't good enough!"
A flame tongue licked his teeth as Ace replied "Surely not, right?!" as a massive beam fired from the sky, making the earth tremble as it fell on top of Thanos' head, engulfing his entire body.
Everyone felt the ground underneath them rumble and Ace snapped his fingers, everything disappearing as Thanos was revealed, scarred and on his knees, but still alive.
Ace let out a breath and said "Phew!" He clasped his hands, making hand gestures before flashing to Thanos and slapping his forehead.
Thanos' body healed to normal instantly as a diamond shaped crystal covered him completely.
He wiped his sweat and his Death God form reverted, returning to his normal appearance, without the crack!
Tony looked at him and said "Hey! Who knew you were just a kid!" Ace glared at him, correcting "Man! I'm like 30 something!" Tony waved, "I'm like 50 something." before he was slammed by a space dragon.
Ace grabbed the crystal with Thanos in it, shrinking it down as he put it in his pocket, he flew away and picked up a few more weapons, sending them to his personal space, while solving the rest of the mindless space android animal insects.
Destroying these didn't taint your soul believe it or not! Ace figured that they were like ants and didn't have souls, either that or they were created not born which wouldn't give it a soul.
Unless, of course, an Infinity Gem was used, like with Ultron and Vision.
A long while later
All the Heroes were left standing, looking at all the corpses everywhere.
Ace floated down and said gently "Don't worry, they have stepped onto another path." Wanda held Pietro's body and cried as Ace let out a breath, waving his hand.
Pietro arrived in Ace's Realm only to be greeted by Vanessa who smiled happily "Who are you?" Pietro was stunned and pointed at himself as a shadow appeared above him, saying "Vanny, bring him to the Palace, I'll be there in a moment."
Vanessa saluted with her little tongue out, saying "No problem~!" as she hummed to herself walking away, "Come on, ugly!" Pietro was stunned and followed her, passing the Sinner's Garden, asking "What's that?"
Vanessa smiled happily "Just the Sinners experiencing eternal torture! Fun, right?!" Pietro was speechless and they left the place.