black eagles route, late part 1 and part 2 plot
crests originate from dragons
sothis is a dragon
there are two sothis, one bad and one good, both are connected, both have crest of flames, bad sothis is the leader of a dragon ruling empire
there are two swords of creation, one for good sothis, one for bad sothis
bad sothis is doing bad things to humans
good sothis asks nemesis, who is bad sothis subordinate, to kill her so that bad sothis will die too
nemesis agrees, and receives sothis crest and sword
nemesis kills bad sothis, but bad sothis doesn't completely die, just braindead(?) for millenia
nemesis creates a new empire
seiros is good sothis daughter
seiros' father was also killed, he is also the white undead dragon from the trailers
seiros inherited her father's crest
seiros is also a dragon
seiros rebels against nemesis and kills him, then founds the church
rhea is seiros
byleth is distantly related to both bad sothis and good sothis
the little sothis byleth talks to is the good sothis
little sothis is a ghost
nightcrawlers try to resurrect nemesis so they can restore bad sothis with his crest
little good sothis knows this since she can see the future
they fail to stop it tho
little sothis along with rhea help byleth go back in time
rhea dies shortly after
little sothis also goes "poof" when she sents him back
byleth double fails again, but brings good adult sothis back to the present, and somehow she is alive now, but weak
meanwhile war is going on
undead braindead nemesis and bad sothis are both alive now
nemesis wields bad sothis sword of creation now
bad sothis cult manipulates edelgard's subordinates to attack dimitri's kingdom
then offer to help dimitri, dimitri together with them retaliate
edelgard is mad and wants to completely destroy dimitri for attacking the empire
byleth comes and changes her mind and tells her what is happening
most of her traitor subordinates, who attacked dimitris kingdom, orchestrate a coup
edelgard and byleth flee to monastery
bad sothis is new leader of empire now
edelgard and byleth seek the help of claude, who was staying mostly neutral
claude doesn't trust edelgard, but byleth vouches for her
dimitri is killed in a battle against edelgard, byleth and claude
claude is later also killed in a battle against undead nemesis
edelgard and byleth defeat nemesis and get the second sword of creation
bad sothis is like ultra powerful now
byleth with help of sothis fuse the swords to create the true sword of creation
byleth kills bad sothis with the sword
good sothis also disappears for good
all the crests are gone for good too
byleth and edelgard supposedly rebuild fodlan