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There are many pathways in the story ofBaldur’s Gate 3. Every choice you make can drastically alter the course of the storyline of the game - including the stories of both your own playable character and the companions they travel with.
Among the ten companions in Baldur’s Gate 3,Minscis the one you obtain the latest in the game during Act Three. Despite entering into the game during the last third of it, Minsc still has a handful of different endings available to him, depending on what actions you take - especially involving Jaheira and her own questline.

Killed By Your Hand
Off-screen,Minsc was taken and infected with a Mindflayer parasite,just like many in your party. However, since he isnot protected by the Emperor inside theMysterious Artefactyour playable character carries around, he isunder the Absolute’s influenceand does its bidding.
When you find Minsc, he is taking orders from aJaheira imposter-the real Jaheira being a friend he traveled within previous Baldur’s Gate games. There are two separate ways for this interaction to go down.

If You Have Jaheira
If thereal Jaheira is in your party, she will try to convince Minsc of the sabotage. He refuses to listen, believing the imposter Jaheira to be the real one. He and the group he travels withwill attack your party.
If youknock Minsc out with a non-lethal attack, you canrecruit him into your partyafter you convince theEmperorto extend theArtefact’s protection to Minsc. However, if you kill him in this fight, he will die permanently,and Jaheira will leave your partyfor the rest of the gameto take him back to his homeland for burial.

If You Don’t Have Jaheira
Should Jaheira not be in your party when you find Minsc (be it because she was not recruited or killed in Act Two), he will beenraged when you kill the imposter Jaheira, believing you killed the real woman. Even if you hit him with a non-lethal attack,he will not be able to be recruited,and his story will end there.
Stands Against The Dark Urge
This ending is only available if you play as the Dark Urge Origin character.
Inside theTemple of Bhaal, theDark Urgewill stand off against fellowBhaalspawn Orin. Once you are victorious, you have the option tolie down and forfeit your lifeor tobecome a champion of Bhaal.
If youbecome Bhaal’s chosen,Minsc (and Jaheira) will immediately leave your partypermanently and exit the room withMinsc lamenting to his hampster Boothat their friend is no more. Once you walk out, bothJaheira and Minsc are waiting with Jaheira’s Harpers.
No matter what you say to the two, itwill always end in a fight(with both having dealt with Bhaalspawns in previous Baldur’s Gate games). Since Minsc is infected with a Mindflayer tadpole, you may succeed in a Wisdom check (25) tocommand Minsc to kill Jaheira before the fight begins- throwingMinsc into a rage before he is killed in the fight afterward.
Destroying The Elder Brain
If yourecruit Jaheira into your party in Act Twoandcomplete her companion quest in Act Three to save Minsc- he willjoin your party. He is a Ranger who can summon his hampster Boo in battle.
Unlike your other companions,Minsc does not have his own personal quest- with the closest being Jaheira’s companion quest, as rescuing him is the end goal. However, he can still be present during your final battle with the Elder Brain.
After you defeat the Elder Brain,Minsc does not have any special cutscenesin the ending. He is not romanceable, so there isno special dialogue for you either.