Fog

is a Tier 4 Water + Air Path Spell.

The caster conjures a visibility-obscuring, dense white fog over a large volume of space, easily covering the size of a village, over a hundred meters wide and dozens of meters high at base tier. The required investment into this spell is substantial; the fog gradually manifests over the first 1 minute of maintaining the spell, and only dissipates over 1 minute after the caster stops maintaining the spell.