Warning Heavy spoilers speculation from fan of series and veteran GM.

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As a BG veteran and bit of story Teller myself too,
Few things most likely happen. Unless our Heroes stop it.

Mindflayer parasites are being used to spread cult of Absolute by Dead three altered by netherise magic to prevent ceremorphosis, bit mindflayers has a kill switch on them to lauch fullscale invasion of mindflayers that has planned to return from timeloop to restore their Lost Empire.

Gates of Hell shall Be opened on The Baldur's Gate plundging The City into Avernus such as The Elturel did on Decend and chaos of bloodwar waged on streets of Baldur's Gate. Thus we Gould run into Raphael and Zariel & Lulu.

Githyanki and The dragons comes fight against their mortal Enemy of mindflayers.
All of those factions shall try to get infernal artifact possessed by shadowhearth that seems to relate pact between githyanki & Tiamat.

All This chaos fighting and death IS The complot of The Dead three to accend once again to godhood such as mortal lives to Be their sacrifice to accend into godhood.


Thus says The a wise Alondo **