What tools to use to remove dry wall plaster from basement

Hey all, I have some condensation coming through from this wall https://imgur.com/a/4cbSAdF which I’m trying to remove all the dry wall plaster to treat it / examine it more. Do you guys have any recommendations to what tools I should use to remove the drywall to fully expose the concrete? I used a metal chisel and a hammer at first which worked well for the bottom portion because part of it was wet, but the dry parts towards the top are a bit more difficult to remove. I’m new to all this so any pointers would be helpful. Thanks!

Just for context this is a finished basement in a row home that was built in the 1920s in Philly