by Yann Golanski
Should anyone except the caster pass within a metre of the rune, the rune will activate alerting the caster of this. If the rune is inscribed on the wall inside a room the rune will not activate if someone passes within a metre of it but is outside the room. As the rune has no mind it will be activated by a kindred using Obfuscate.
The rune is not blood red in colour but is a shde lighter or darker than the surrounding paint/wallpaper etc. and can be seen if it's in a place that's visible (ie not inside a drawer).The difficulty of spotting the rune depends on where it's placed - a rune in the middle of the wall is easier to spot than one in a corner affected by mildew. The caster can have up to his Thaumaturgy level of runes in operation, he/she will instinctively know which rune has been activated.