Vapour Shot

Droplets of water starts gathering from air, manifesting into a cloud of mist (maximum 1 cubic ft. of size) in front of your magic focus.

Instant Attack. You may trigger this spell instantaneously. In such way, the mist charges in a straight direction towards a target of your choice within range. Make a ranged spell attack against the target. On a hit, the target takes 1d4 Piercing damage + 1d6 Bludgeoning damage, and the target is considered as being mildly dampened with water. If the spell is hit twice, the target is considered wet.

Charging Attack. You may choose to focus on charging the mist. On the end of your next turn, your concentration unconditionally ends: The mist wave expands up to a maximum of 5 cubic ft. of size, and charges in a straight direction towards a target of your choice within range. 
The final attack damage of the Charging Attack is a total of 2d4 Piercing damage + 2d6 Bludgeoning damage. Unless the charged attack is blocked by an object which has no gaps over a 5 ft. area perpendicular to the direction of the spell (For example, a Wall of Force covers the target), this spell attacks the target and cannot be redirected by any nonmagical means. 
Objects that get in the way are also impacted by the potent blow of the charged mist wave. If there is at least 1 Bludgeoning damage die left, and at least 1 target that is not hit by this spell already (which is not the target) within 5 ft. of the line of attack direction, you may choose to subtract 1 Bludgeoning damage die from the total damage and make a ranged spell attack against that target. On a hit, the target takes that much damage. If there are no targets other than the spell’s original target, the remaining mist wave hits the original target. Make a ranged spell attack against the original target. On a hit, the target takes that much damage. If Charging Attack hits any target, they are considered wet.

Weathering. If this spell is casted within 5 ft. of an inanimate, liquid water source, or it is casted under raining conditions, for the Charging Attack option of this spell, you may choose to drain 500 millilitres of water from the source. In such way, the Piercing damage die becomes a d6, and the Bludgeoning damage die becomes a d8. If this spell is casted under hot conditions (under harsh sunlight, inside a volcano, etc.), you must only use the Charging Attack option of this spell, and it requires 2 turns instead of 1 to release the attack.

At Higher Levels. When you cast this spell using a spell slot of 2nd level or higher, gain 1 extra Piercing damage die for each slot level above 1st, and 1 extra Bludgeoning damage die for each 2 slot levels above 1st.

When I created this spell, I had to think about splitting every molecules precisely into the perfect shape for maximising the damage. Nowadays people could just do the same thing with nano-machines!

—— Alma