Major Image

Build a full interactive simulation that looks and feels real — but is not.

What This Skill Does

In D&D, Major Image creates a multi-sensory illusion — visual, auditory, thermal, even olfactory — that persists and can be animated. It is convincing enough that creatures must actively investigate to see through it. The real-world version is the interactive prototype: the demo that makes stakeholders ask 'wait, is this real?' The answer is no, but the conviction is the point. Clickable Figma prototypes, scenario simulations, pitch decks with working demos, preview environments with synthetic data. Major Image is the spell that sells a future state before it is built. In this grimoire, Major Image is treated as a metaphorical spell with a shipping-now delivery profile. Canonical reference input: Major Image (spell).

When To Use

• Stakeholders need to experience a proposed feature, product, or workflow before committing to build it.
• A pitch, demo, or presentation needs a working simulation rather than slides.
• Scenario planning requires a realistic preview of how a system would behave under specific conditions.

Prerequisites

• No extra runtime dependencies beyond Hermes Agent and the normal toolset for this session.

Procedure