Wall of Smoke

You create a barrier of smoke, this wall of ashy vapors the spellcaster creates with this spell obscures all sight beyond 2', though the caster may create less smoke if they wish, improving the range of sight. The wall when created must be a roughly cubic or rectangular mass, at least 10 ft. across at its smallest dimension. A moderate wind halves the spell's duration, while a strong wind completely shreds the wall. Creatures within this barrier suffer no damage, but must spend the same number of rounds recovering (clearing their eyesight, regaining their breath, and so forth) that they spent inside the Wall of Smoke, unless they prepared for it (by holding their breath, perhaps, or breathing through a wet rag).