Where's it at?

Eh... Once you get use to the game, it isn't too bad. I don't even use the healing items anymore except for the wine skin. Not when you get cool spells like Lesser and Greater Heal. Learn where the magic circles are on floors and start using buff spells, and the difficulty will fall away.

Another tip is go to the tower with the fountain of thera in it, towards the beginning of the game, with all the sharga's running in circles with a shield and just hang out. Let them hit you till your shield skill is at 5 dots. Heal as necessary at the fountain. You should get some health which will increase your HP too. After that, make sure to stick around at all the supposed "Infinite Monster" spawns. Like the drains that the ants/snakes will pour out of and kill them till they stop spawning. At least till you reach the dwarven clanhall. Go mash on the magic flint next to the dwarf. It'll take 30 minutes to an hour, but you can max out all your combat stats there.