Watery Double

Any still body of liquid this spell is cast on becomes a trap for the next creature to cast its reflection in the liquid. The first creature to cast its reflection in the liquid during the duration causes a watery double to rise from the surface. This creature's size reflects the size of the body of liquid it comes from, but cannot exceed the size of the triggering creature. This watery double immediately begins attempting to touch the triggering creature, using that creature's Strength bonus to attempt melee attacks. It has the same hit points, ability scores, and AC of the triggering creature at the time the spell is triggered, but it cannot use any class or racial features. If the watery double successfully touches the creature, it begins to cover it in liquid. The creature must then make a Strength saving throw. On a success, the watery double is destroyed, and the creature is soaked. On a failure, the creature begins taking 3d8 acid damage every turn. The creature also takes damage equal to half of any damage the watery double takes. Casting a create or destroy water spell or similar magic on the watery double immediately destroys it. Casting shape water allows the caster to make a check using their spellcasting ability modifier against the spell save DC of the caster of watery double. If there is no spell save DC available, the DC is 15. At Higher Levels. If cast with a 4th level slot, the duration is one week. When cast as a 5th level spell, the duration is one month. When cast as a 6th level spell, the duration is one year. Casting with a 7th level slot makes the spell permanent.