Deceptive Aura

You place charcoal power in a specific rune-like shape on the ground, and then add gunpowder to it, creating a unique sigil which you can then at any time activate. This sigil when activated creates a 150 ft diameter sphere from its centre, which can be shaped to look however the caster wishes. You can choose to nullify darkvision's effects when inside this area. You can choose to instil blindness upon any creature that enters this area, for until they leave it. You may choose to mute this area & prevent all sound from entering, leaving, or being transmitted through it. You may choose to nullify blindsight in this area. You may choose to nullify tremorsense in this area. You may choose to nullify truesight's effects in this area. The area's appearence way be altered as you please, but the actual layout of where it occupies becomes indestructible. This area cannot be noticed as an illusion unless you are inside it and succeed a DC 22 wisdom check. Perceiving the area as an illusion stops you from seeing its projected appearence, but does not stop any of the other effects of being inside its area. You may deactivate the sigil at will, doing so instantly removes all effects of its area & causes the terrain around it to be altered again. The sigil used for this spell may be reused until destroyed. The sigil may only be destroyed if it is set on fire by a magical fire created by a spell that is 8th or 9th level, or if it is set alight by a fire created by its creator, specifically to destroy it.