Curtain of Invisibility

Level	4th Level	Casting Time	1 action	Range	40m
AoE	Special	Duration	Concentration, up to 1 hour
School	Illusion	Components	V, S, M (a square of black silk)
Classes	Arcanist, Bard, Red Mage, Time Mage

You create a transparent invisible wall that makes any creatures on one side of the wall invisible to those on the other side.

You choose which side of the wall provides

to the creatures on that side when you cast the spell. You create either a 3cm thick wall in a straight line up to 20m long and 3m high, or a 3cm thick, 4m radius ring with the same height. The wall is intangible and stands vertically in either of the two forms. If you wish to do so, you can create the wall with a shorter length or height, or with a smaller radius. Any creature that crosses the wall becomes visible or invisible as appropriate, and it's visible if any portion of it is on the visible side of the wall. If a creature rendered invisible by the wall attacks or casts a spell, it becomes visible.

At Higher Levels. When this spell is cast using a spell slot of 7th Level or higher, the creature's invisibility no longer ends if it attacks or casts a spell.