Priest could not see you and concludes you are moving within the ground. He would activate his sensory and as soon as you appear behind him, he would create a small earth pillar directly under you to send you mid range away from him. He would quickly turn towards you and stream a large hot water that moves above the ground towards you.
So the jutsu you'll be using is supplementary and defensive. You will use the jutsu to create a chasm in which the water gathers while stopping the water from getting to your position. That is just one of the numerous ways you can use it.
(Doton: Doryūkatsu) - Earth Release: Earth Flow Divide
Rank: C-A
Type: Supplementary
Range: Short/Long
Chakra Cost: 15-30
Damage Points: N/A
Description: The user will first perform the required hand
seals Rabbit → Boar → Rat → Horse → Tiger → Snake and
slamming the hands on the ground, the user can, by flowing
concentrated chakra into the Dragon Veins flowing
underground, tear the earth apart, creating large chasms by
raising the earth in two oposite sides in the desired location
and then splitting that piece of earth through the center. The
length, width, direction, and curve of the chasm are all up to
the user. Manipulating the Dragon Veins requires fine
chakra control, but if one has such skill, they can use this
technique to divide the space between the enemy and their
own team in two, destroy enemy camps or defences, and
even to attack.
Note: This does not split the earth appart directly to cause
opponents to fall in the fissure.