Dreamsmoke
-This spell enchants smoke from a nearby fire so that the caster can create illusionary effects. The smoke takes a while to spread out, and the area it covers is, potentially, very large. If the spell is cast over a couple of minutes, then the smoke will cover a circle of about 10 metres radius.
Sounds can also be generated, but not much more than the sound of a roaring fire. Anyone who listens carefully may distinguish crackling amongst the illusory sounds.
Pretty much anything that the caster can imagine can be generated in the smoke. Once created, the image can move about within the confines of the original area. It is, generally speaking, a good illusion, but a trained observer or an expert might detect anomalies.