Octogone Constellation

Led by a child of the knowledge bearers, a child of the world-shapers, a child of cartef, a child of the abyss, a child of the crafters, a child of the forest, a child of flames, and a child of the material joined together to save the world. Then, they had to restore balance to it. After, they tried to return home to their families.
First was the child of the material. Over celebratory drinks with their loved ones, the knowledge bearer poisoned their glass. Simply, easily, with no struggle. Because the child of the material trusted the man that had just helped them save it. Days after their victory, the material lost its dearest child.
The child of flames was approached in a field of tall grass. They were trying to find a way back to their home, they weren’t sure they’d ever make it back. Seeing the knowledge-bearer again was a welcome surprise to the child of flames. As the creator of the spell, and a master spellcaster in his own right, the child of flames thought his approach might mean he’d found a way for them to go back. The child of flames didn’t find it unusual that the knowledge-bearer had his husband at his side, & didn’t care to notice the blade of black ice he carried.
The knowledge-bearer approached slowly, wary of the oncoming battle. The child of flames waved joyfully, blissfully unawares. The knowledge-bearer reached out his arm, uttered a spell, and the child of flames froze, arm outstretched, but flames still ablaze. The child’s flames continued roaring, reaching for their attacker, sputtering and spurting every which way but to no avail against the knowledge-bearer. His husband brought the blade of black ice towards the child, but his aim was off because of the bonfire the child had become. He managed to slice off their arm before being engulfed in flames.
In a rage at the defenseless child harming his husband, the knowledge-bearer uttered forbidden arcana and felled the child right then. In a field of grass far from home, the child of flames fell to grass and his soul burned the meadow.
The child of the crafters was cornered in the safest place known to their kind: the tunnels undermount & ground. Tunnels sacred to their people, but a secret they’d shared with the knowledge-bearer. They were almost at the path home when they started choking on water in their lungs. In the darkest, driest part of the world, the child of the crafters drowned, mere hundreds of feet from their home. The water appeared from nowhere and crushed everything inside, they were helpless. With crafters’ bones being stronger than any other, their spine and ribcage was the only thing that survived the assault. The bones meant to protect were the only thing to survive.
The child of the forest accomplished the most before the knowledge bearer came for them. They were in the midst of building a new forest, to help heal the land that had just been sundered in the final battle, when they were approached by the commanders of said battle: the knowledge bearer & his husband. Convinced to peace by his altruist love, the knowledge bearer’s husband and the child of the forest began talks, trying to persuade each other to see things their way.
While they spoke, the knowledge bearer, whom neither had any reason to distrust, stole the sword of his lover and raised it against the child. Knowledgeable though he is, weaponry has long eluded him. His swing is wide and low. And takes the leg of the forest’s child. Shocked, his husband turns and holds him back, allowing the child of the forest to become an ape in an attempt to escape, but transformed into one missing its leg. Trapped where he was, the knowledge bearer unleashed his arcane magic upon the child, turning them to dust before they could yet move. All that’s left of the child of the forest was a leg and an unfinished home without them in it.
Finally, was the child of the world-shapers. Their power had been grafted on, a gift from one of the first gods to their people in ages past. From the start, it was clear what was necessary to return it. But the kid world-shaper smelled a war brewing from those who overthrew dragons. They sought to protect their people, their home, their family. With their Hand, they could save anyone felled in a petty fight. They could raise any soldier lost in battles without reason.
The knowledge-bearer would not have this. He raised Savoir and called down the flames he knew the child of the world-shapers to be vulnerable to, fearful of. Without thought for their home, family, or the people they could protect still, the knowledge-bearer tore the young world-shaper from the earth in violent flames and screams.
The Hand was returned to their people, nevermore to be used.
The knowledge bearer tore children of the world from their homes, taught them untold powers, then killed them when they were finished. The seven form an octagon in the sky, saving a place for the knowledge bearer. For, one day, he will join them and be just as helpless as they. In the Octogone, they wait. They have all the time in the world.

One of historians' favourite debates is over the meaning of this legend: over who each of the children were, what the significance of the pieces left behind of them is; but the prevailing theory on each of their races is as follows:

the knowledge bearer	high elf
child of the world-shapers	goliath
child of cartef	firbolg
child of the abyss	tiefling
child of the flames	fire genasi
child of the crafters	dwarf
child of the forest	wood elf
child of the material	human

What of the other children?
They escaped, lived out their days, or suffered a fate far worse, but they were not killed by the man they served.
The child of cartef saw the knowledge-bearer coming. Escaped, returned home, and still never saw her family or the knowledge-bearer again.
The child of the abyss is said to have been cursed by the gods, their face torn from their body and their children cursed to never have faces of their own. With their face went the borrowed power, saving them from the knowledge bearer.