The spell lasts until the sun either rises or sets. During the dawn and twilight hours everything affected by this spell is allowed one Save against its effects, but is otherwise helpless.
The Magic User should move cautiously, as if there’s no magic at work, for this spell to be safely effective. They ought to avoid direct lines of sight, preferring shadows to light, and take efforts to not make much disruptive noise. They should stay hidden in the periphery of others vision.
Whether or not they do these things nothing will notice them though, in day or night. The gaze of the night watchman will glance in the wrong directions, and even dogs ears will not hear the little sounds they make. Sleepers will not awake when windows creak slowly open, guardsmen at gates will look to their feet at the moment of passage. Things gone missing are not realized as gone, at least until the changing of the sunlight. If the Magic User were to speak, shout, or even scream, no one would hear it.
The Magic User is not restricted in any way while under this spells effect. They may do anything they are usually able to, including casting other spells.
All Risky Casting rolls for this spell are made at the end of this spells duration, not as it is cast. If any conditions for a Risky Casting are met while casting this spell, or while under its effects, a Risky Casting roll will then be required (or modified).
The caster is able to Save to not be affected by an instance of the following Risky Casting Conditions per level. The Referee should keep a silent, but sincere, tally of such violations until the spell has ended, and then allow the Magic User to make (or fail) their saves.
Risky Casting Conditions
Exposure: Making no efforts to be hidden. Standing in direct plain view. Moving through a direct, unambiguous line of sight without any cover or obscuring elements. This applies to all possible viewers, even "friendly" ones.
Noise: Moving oafishly. Stepping on cats tails, knocking over pots and pans. Breaking windows, doors, crockery. Shouting, speaking, ringing bells, playing instruments.
Action: Stealing things sitting in plain view. The food off a plate as its eaten, the shirt off of someones back. Touching someone with willful force, harming them with a weapon or other implement, attempting to move a conscious being against their will. Moving a sleeping person, or the things they rest on. The Magic User casts a spell after their usual level-based limit.
Condition: The Magic User reaches more than Light encumbrance. The Magic User is injured.
Event: during dawn or dusk, a being Saves against the effects of this spell.
n.b. basically, whenever you would give someone a chance to make a stealth or (sleight of hand) roll to be sneaky this spell is still “safe”, and if they do anything where it would be ridiculous for a roll to work it becomes a risky casting. They stay invisible either way.
1. Anything that was or is looking for the Magic User will find them by the changing of the sunlight.
2. The Magic User is not aware of anything outside of their direct line of sight until the changing of the sunlight.
3. Nothing physical reacts to the Magic User until the changing of the sunlight. They cannot manipulate their environment in any way. Even opening a door is impossible. It’s as if they are immaterial, but cannot pass through solid matter.
4. If being noticed by a being, but then not noticed, The Magic User has a chance of ceasing to exist unless they Save. They are in an ontological fugue if this happens, for all others it’s as if nothing the Magic User did ever happened. They will have never existed, so that no one has ever even imagined them. If this happens they will reappear where the spell was cast when the sunlight changes, and reality instantly readjusts to be as it was if they had always been.
5. The Magic User has only an intermittent relationship with causality, everything they change will have a chance to snap back to being “undone” at the changing of the light unless they Save.
6. All things that were done by the caster while under the effect of the spell become common knowledge, everyone involved in any of it it knows exactly why it happened, and who did it.