The first person to cast a reflection in the liquid affected by this spell is attacked by a double of themselves that's made of the liquid. The double attempts to flow over them, completely covering their body. When it does so, it begins to crush and suffocate them.

Binding (Gaze) 10 [104] 
    Constricting [+75%] 
    Engulfing [+60%] 
    Suffocating [+75%] 
    Homing (Vision, 9 extra passes) [140%] 
    Accurate 2 [+10%] 
    Delay (Triggered) [+50%] 
        Attacks the first creature casting a reflection in the liquid's surface 
        Can be ended by violently disturbing the liquid's surface 
    One-Shot [-10%] 
    Maximum Duration (1 minute) [-65%] 
    Can Only Target a Liquid Surface [-20%] 
    Magical [-10%] 
    Spell Components [-20%] 
        Must say "double" in Latin 
        Must gesture with hands 
Levels 2+ [+10.4/level] 
    Increase Binding by 1 level [+6 base]