Should I Give Astarion the Tadpole?

When It Makes Sense

• Good fit: You want to expand Astarion’s combat toolkit and unlock Illithid Powers. As a Rogue—or any class you respec him into at Withers—Astarion gains access to psionic abilities that do not consume spell slots or depend on a specific weapon. These can include forced repositioning, short-range teleportation, psionic damage, and crowd-control effects. The extra options can create new Sneak Attack setups, let him escape threatened squares without Disengage, or support the party by manipulating enemy positioning. If you enjoy buildcraft, action-economy advantages, and testing synergies, the tadpole adds a free, permanent subsystem that is independent of gear and level-up choices.
• Good fit: Your roleplay or narrative direction embraces illithid power as a practical tool. Astarion is generally pragmatic, self-interested, and drawn to sources of strength; offering him a tadpole often aligns with his personality and can earn approval in many dialogue paths. If you are playing a Tav or Origin character who believes the ends justify the means—or who has already accepted illithid powers themselves—giving Astarion the tadpole keeps the party’s philosophy consistent and can trigger additional companion conversations about control, survival, and corruption.

When You Should Avoid It

• Warning sign: You are playing a morally grounded, squeamish, or redemption-focused character who treats the tadpole as body horror rather than a power-up. Companions such as Wyll, Gale, and Karlach may react negatively to the use of illithid power, and forcing Astarion to ingest a parasite can undermine a ‘good hero’ or ‘protect the party’s humanity’ run. If preserving the agency and bodily integrity of your companions matters more than extra abilities, refusing the tadpole is the more thematically coherent choice.
• Warning sign: You are on a first playthrough and are unsure about late-game consequences. Consuming a tadpole is generally permanent for that companion in that save, and the decision cannot be reversed without reloading an earlier save. While the choice does not instantly turn Astarion into a mind flayer, it does tie his build and certain dialogue flags to the illithid system for the rest of the game. If you dislike locking in irreversible decisions before you understand the story or Astarion’s personal arc, it is safer to decline until you have a backup save.

Pros and Cons

Pros

• New tactical options. Illithid Powers give Astarion access to abilities that are independent of weapon attacks and many normal resource pools. Depending on the powers you unlock, he can force movement, deal psychic damage, grant himself or allies temporary advantages, or improve mobility. These effects can be combined with his normal actions, making him more flexible in stealth, ranged, and melee situations and giving you more ways to handle difficult fights.
• Narrative and approval rewards. In many dialogue paths, Astarion appreciates being trusted with power and may approve of the gift. The decision can also open unique conversations about control, dependence, and what it means to use an enemy’s weapons against them, potentially deepening his companion arc and your romance or friendship with him.

Cons

• Permanent and irreversible. Once Astarion consumes the tadpole, the associated powers and their narrative implications generally stay with him for the rest of that playthrough. If you later change your mind about the build, the aesthetic, or the roleplay direction, you will need to load an earlier save to undo the choice. This makes it a higher-stakes decision than a simple skill reset.
• Thematic and companion friction. Illithid powers are portrayed as alien, invasive, and potentially corrupting. Other companions may disapprove of the choice or react negatively in later scenes, and some players find that the option conflicts with a heroic, altruistic, or redemption-focused story. If you want your party to present a united moral front, adding illithid powers to Astarion can complicate that goal.

Decision Checklist

• What is Astarion’s current or planned build, and would Illithid Powers fill a tactical gap rather than duplicate what he already does?
• Does my character’s moral stance allow using a mind flayer parasite as a weapon, or would refusing it be more consistent with the story I want to tell?
• Am I comfortable with the choice being permanent, and do I have a save file I can return to if I dislike the outcome?
• How will this affect my relationships with other companions who may judge the use of illithid power, and does that fit my intended playthrough?

Alternatives to Consider

If you are not convinced, the simplest alternative is to leave Astarion unchanged and invest in his existing Rogue abilities, gear, Feats, and party positioning instead. You can respec him at Withers to a different subclass or multiclass build—such as Fighter, Ranger, or a Rogue/Fighter mix—that achieves similar tactical goals without involving the tadpole. Another option is to consume tadpoles only on your own player character, keeping companions ‘clean’ while still experimenting with the illithid system. You can also choose not to collect tadpoles from dead mind flayers and ceremorphs, which removes the temptation entirely and supports a ‘no illithid’ playthrough. Finally, because Baldur’s Gate 3 relies heavily on manual saving, you can give Astarion the tadpole temporarily, test the powers and any new dialogue, then reload your previous save to commit to the version you prefer.

Final Recommendation

Give Astarion the tadpole if you want to boost his combat flexibility and are roleplaying a pragmatic, survival-first, or power-focused party. It is especially fitting if you have already embraced illithid powers yourself and want Astarion’s abilities to reflect that shared direction. Avoid it if you are uncomfortable with the body-horror themes, are trying to maintain a ‘pure’ heroic narrative, or are playing through for the first time and do not want to lock in an irreversible decision early. In all cases, save before the choice and remember that Baldur’s Gate 3 is designed to reward multiple playthroughs: there is no single ‘right’ answer, only the one that best fits your story, build, and comfort with the tadpole’s lore implications.