"Alright, is everyone ready to release the water?" Gil had taken the lead in organizing those who would be opening water valves on the pipes.
The plan was simple, the water pipes would be opened and Walker would use his manipulation skills to hold it in place in front of the entrance to the mines. Remey would add half a barrel of the basic potion to the water making it poison to the acid slimes behind the barricade. Then when the barricade was removed then the water would rush down the stairs and destroy the slimes along with clearing a path for them to go downwards.
"Are you sure that you will be able to remove the barricade in a few seconds?" Walker double checked with the royal guard to be sure the plan could move flawlessly. If the barricade wasn't removed as soon as he released the water there was a risk of slimes or basic water harming those around.
Creation is hard, cheer me up!