Fire Emblem Three Houses: Wanderer

God Shattering Star

Author's Note: It is very important for this chapter to note that the Gatekeeper one shot and supports I wrote is techinally the canon for this story. So the Gatekeeper does have all the views expressed in said supports.

The Gatekeeper clenched his spear as the undead warlords approached. Nemesis made eye contact with the therapist who growled, "Evacute everyone."

"What will you do?" Lysithea demanded.

"I will do what I failed to do so many years ago," Gatekeeper replied, "And hold the line. Bury me in the fields of flowers that something may grow when I-"

Lysithea slapped the Gatekeeper, "No! You are a part of this family and we stick together! We're standing our ground! Together!"

Lysithea summoned black spikes, Dark Spikes T, and smirked, "No one is going to hurt my family..."

"Alois," Seteth demanded, "What's the word on the evacuation?"

"The civilians are all ready to leave with protection from the Chimerias," Alois explained, "But what about you?"

Seteth gripped his ax, "You are a man who believes blood has no inherit worth yes?"

"Techinally yes but I still love my blood family," Alois explained.

"Nemesis is a man blinded by blood ties," Seteth elaborated, "A blood family can be a real family but alas, because of blood and the false belief of its inherit worth, Nemesis, years ago, killed my family that was both blood and real family. I've decided that today is the day I must avenge them. Make sure Flayn evacuates."

"Understood brother," Alois smiled, "But I need a favor in return."

"What?" Seteth inquired.

"When we win this," Alois smiled, "You return to Flayn alive... Cichol."

Seteth smiled, "Of course brother. Of course... how did you know?"

"You were quite overjoyed to see Sothis again," Alois explained, "And well... given how you just spoke about Nemesis..."

"Ah of course," Seteth replied, "Well, go assist the evacuation. I will return shortly..."

Seteth got atop his wyvern and flew into combat against his old enemy...

"Byleth we have to evacuate," Marianne pleaded, "We can't fight him with our strongest soldiers at Shambala."

"Marianne," Byleth sighed, "I understand your concern but if no one holds him off he will slay all of us.  We need to at the very least protect the evacuation. Leonie is already assisting me. Helping us or the evacuation are both equally helpful so do whichever. Both are very important."

Marianne sighed, "Fine. Guess it has to be done..."

Seteth, Marianne, Byleth, Lysithea, and Leonie stood before the toxic swamps, the smell of bog water and rotten flesh filled the air as the Ten Elites stood with the conqueror himself. Nemesis.

"Fell Star!" Nemesis cried out, "Serios! I- Me- Kill! Kill!"

Nemesis let out a primal cry, blade in hand.

"We don't need to win!" Byleth reminded, "We need only to stall!"

Lysithea turned to Leonie, "I've got a plan. That mage over there is radiating a ton of magical energy. Ready?"

"Warp me," Leonie smiled.

Lysithea warped Leonie to one of the 10 Elite, a mage.

"God you reek!" Leonie exclaimed, "You're the one making this swamp! Aren't you?"

The undead mage didn't reply and struck with Mire. Leonie's horse leapt out of the way, which allowed Leonie to leap off her horse and impale the mage. The swamp water faded away, which allowed Byleth to charge at another general, which he slashed apart. Seteth glared at Nemesis and charged forward, killing a third elite with a throwing ax. The elite countered with their bow which Seteth took to the arm, a mere flesh wound that Marianne healed with Physic...

But alas...

The enemy then countered.

Marianne and Lysithea were cornered and had to avoid a volley of arrows from enemy archers, a throwing spear hit Marianne in the leg, who cried out in pain. Leonie was stabbed in the leg by an enemy elite who held a spear, Seteth was impaled by a sword wielding elite, and Byleth was surrounded, and despite cutting down several enemies, knew he would be overwhelmed.

"Retreat I'll cover you!" Byleth cried out, "Tell Dorthea I love her! Tell my family love them!"

"Tell me yourself!" A voice exclaimed.

Sothis, Dorthea, Claude, Dimitri, Ashe, Catherine, Shamir, and Felix revealed themselves. Felix rushed over to Lysithea, cutting down an enemy elite in his way. Leaving 6 elite left which were slaughtered in a frenzied assault from the Chimerias. Nemesis glared at Byleth and Sothis as Sothis demanded under the barrage of Claude's arrows killing one elite, Dimitri charging pass to decapitate another, Shamir and Ashe's double team assault on a third, Dorthea's meteor crashing from the Heavens above to kill a fourth, Sothis herself turning a 5th to dust, and finally Felix who slashed the last in two to protect his romantic love.

"Kill..." Nemesis glared, "You..."

Nemesis glowed with an unholy light or countless Crests and struck at Byleth who was protected by Sothis. Byleth then cried out, "This one's for my family you crusty old bastard!"

With a single, mighty swing, he cut Nemesis across the chest, the wound gushed blood as the war lord fell...

The allies regrouped, all happy to see each other.

Felix embraced Lysithea, "I'm so glad you're OK."

"I am with you here," Lysithea smiled kissing his check.

Dorthea helped heal the wounds of her allies as she approached Byleth.

"So..." Dorthea smiled with a flirty wink, "How about we catch up over some tea?..."

"It's finally over?" Sothis asked.

"I'll check," Claude replied poking Nemesis with an arrow before offering his signature smile to his allies, "Yeah seems about dead to-"

Claude was blown back and caught by Dimitri as Nemesis changed.

"Kill..." He growled... "You..."

"Wait how many Crests does he have?" Sothis demanded.

"I would assume given the syringe I stole," Felix explained, "All of them if he could."

There was a primal, draconic cry as bone extended from the back or the monstrous war lord.

"It can't be..." Seteth muttered, "Could so many Crests really allow a human to-"

Nemesis got on all fours, his body morphed and mutated into something dark and evil. Something truly unholy. A dragon black as the abyss, with wings of bone and thin black flesh that cried out and flew away.

"Wait he's headed for..." Ashe pointed out.

"Of course it ends there," Dimitri sighed.

"Gronder Field..." Byleth growled as he clenched his fist, "Come on! We have to stop him before he destroyes Fodlon!"