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Deals Guide: Demon

Once the written contract is signed (in iron gall ink, not blood—blood is a conflict of interest), you must state aloud: "I enter this pact of my own free will, with sound mind, under no duress, and I reserve the right of renegotiation at every Sabbat."

If the demon flinches, you have a bad deal. Renegotiate.

Before taking a deal, ask:

A Demon cannot lie within the boundaries of a signed contract, but they are masters of omission. Watch for these linguistic traps:

  • The "Forever" Clause:
  • The Ambiguity Trap:

    • In ancient Mesopotamia, practitioners would invoke pazuzu or lilin not for eternal servitude, but for specific, transactional favors. The shift from "spirit bargaining" to "eternal damnation" came with Christian theology. The Church needed a villain, and the demon became the ultimate loan shark. demon deals guide

    | Cost | Typical Reward | Best When… | |------|----------------|-------------| | Health containers | High damage, flight, piercing shots | You have spare HP or a way to regain containers | | Current HP (non-refundable) | Stat ups, soul hearts, strong actives | You have excess soul/armor HP | | Max HP reduction | Transformations, rare items | You already have low max HP (less loss) | | Future curse / debuff | Free item now | You’re strong enough to end the run soon |

    A demon deal is good if it prevents more damage than it costs. Once the written contract is signed (in iron

    You are trading future survivability for immediate power. The key is knowing if that power will let you clear rooms/faster/bosses, saving more HP than you spent.

    Common media shows circles protecting the summoner. Wrong. The circle protects the world from the demon's passive influence. Draw it correctly. One smudge allows the demon to whisper directly into your ear during negotiation, and you will agree to anything. Before taking a deal, ask:

    | Character | Strategy | |-----------|----------| | High HP characters (e.g. Magdalene) | Trade containers freely early, then rebuild | | Low HP glass cannons (e.g. The Lost, Judas) | Take only game-winning items; otherwise skip | | Soul/armor dependent (e.g. Blue Baby) | Demon deals cost only what? In Isaac, BB pays with soul hearts – be very careful. | | Regen-focused (e.g. Bethany) | Use red hearts before soul hearts, since you generate charges |