{"schemaVersion":1,"record":{"key":"mechanic/boss-fight-atlas--boss-ally-theft","type":"mechanic","id":"boss-fight-atlas--boss-ally-theft","lang":"en","title":"Ally theft and charm","summary":"An existing ally temporarily changes allegiance and becomes a threat.","updatedAt":"2026-10-22","status":"active","url":"https://gamemechanics.pro/en/knowledge/mechanic/boss-fight-atlas--boss-ally-theft/","jsonUrl":"https://gamemechanics.pro/api/v1/knowledge/en/mechanic/boss-fight-atlas--boss-ally-theft.json","markdownUrl":"https://gamemechanics.pro/content/knowledge/en/mechanic/boss-fight-atlas--boss-ally-theft.md","aliases":[],"tags":["Boss fights","States, resources, and scaling"],"sourceIds":["source-5387d37f98d2db0d","source-3be68a97d1aeadb2","source-89352613766e5833","source-bca6cf62c24cfbf4","source-c0f2aaf036deec28","source-c151324fe6097460","source-d57ce0c85fd553f3","source-4330310a4b30fdb4","source-2c413a292b57f033","source-baa603af3b0bf305"],"sources":[{"id":"source-5387d37f98d2db0d","title":"Boss Fight Atlas: Ally theft and charm (RU)","url":"https://polyakovin.github.io/boss-fight-atlas/ru/mechanics/ally-theft/","verifiedAt":null},{"id":"source-3be68a97d1aeadb2","title":"Boss Fight Atlas: Ally theft and charm (EN)","url":"https://polyakovin.github.io/boss-fight-atlas/en/mechanics/ally-theft/","verifiedAt":null},{"id":"source-89352613766e5833","title":"The Siren · The Binding of Isaac: Repentance","url":"https://www.youtube.com/watch?v=qj288Dmw8Q0&t=5s","verifiedAt":null},{"id":"source-bca6cf62c24cfbf4","title":"Fiore DeRosa · Bravely Default","url":"https://www.youtube.com/watch?v=vMRukz57fnc&t=330s","verifiedAt":null},{"id":"source-c0f2aaf036deec28","title":"Lady Deathwhisper · World of Warcraft: Wrath of the Lich King","url":"https://www.youtube.com/watch?v=mseB_We9mes&t=40s","verifiedAt":null},{"id":"source-c151324fe6097460","title":"Boss Up: Boss Battle Design","url":"https://media.gdcvault.com/gdc2018/presentations/Keren_Itay_BossUp.pdf","verifiedAt":null},{"id":"source-d57ce0c85fd553f3","title":"The Siren — The Binding of Isaac Wiki","url":"https://bindingofisaacrebirth.wiki.gg/wiki/The_Siren","verifiedAt":null},{"id":"source-4330310a4b30fdb4","title":"Bravely Default: Chapter 2 — StrategyWiki","url":"https://strategywiki.org/wiki/Bravely_Default/Chapter_2","verifiedAt":null},{"id":"source-2c413a292b57f033","title":"Lady Deathwhisper — Warcraft Wiki","url":"https://warcraft.wiki.gg/wiki/Lady_Deathwhisper","verifiedAt":null},{"id":"source-baa603af3b0bf305","title":"The Binding of Isaac: Repentance","url":"https://www.youtube.com/watch?v=qj288Dmw8Q0&t=30s","verifiedAt":null}],"sections":[{"id":"principle","title":"How it works","body":"An existing ally temporarily changes allegiance and becomes a threat."},{"id":"variants","title":"Variants","body":"### How the technique works\n\n<a id=\"boss-ally-theft-rule\"></a>\n\n- An existing ally temporarily changes allegiance and becomes a threat. <a id=\"boss-ally-theft-definition\"></a>"},{"id":"context","title":"Context and limits","body":"A concise reference to all 124 Boss Fight Atlas mechanics across its 14 source sections. 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Gameplay recording by SlayXc2. Original visible source markings retained. All rights reserved; excluded from portal MIT and CC BY 4.0.","caption":"The Binding of Isaac: The Siren’s song can charm familiars","alt":"The Binding of Isaac: The Siren’s song can charm familiars","markers":[{"x":57,"y":23,"label":"The song temporarily turns an existing familiar to The Siren’s side"}]},"tips":["Show the ally’s allegiance change and a clear moment of returning to player control."],"examples":[{"title":"The Binding of Isaac: Repentance","url":"https://www.youtube.com/watch?v=qj288Dmw8Q0&t=30s"}]}},"endsAt":null,"provenance":"Editorial reference index based on the 124 public Boss Fight Atlas mechanic pages checked on 2026-10-20. Original concise RU/EN definitions by gamemechanics.pro; source categories, game/boss associations and reference URLs retained from the atlas. 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