Crimson Mist

You create a 20-foot-radius sphere of red mist centred on a point within range. The sphere spreads around corners, and its area is lightly obscured. The mist clings to any organic matter within the area, revealing anything invisible within the mist. The sticky blood-like mist clings to the organic matter for 1 minute after it is no longer in the spell's area. The spell lasts for the duration.

As a bonus action you can move the sphere 20ft in any direction.

At Higher Levels. When you cast this spell using a spell slot of 2nd level or higher, the radius of the mist increases by 20 feet for each slot level above 1st.