My party is:
Three lvl4 rangers + lvl 2 druid
I'm stuck in the tomb of the vale of shadows. I can't kill myrkul's sendling. Ordinary weapons don't seem to work against him. I've tried creating a mage, but she can only cast a spell once before I have to go back and buy it again

Same thing with my druid. I got this game for cheap for $5 without the manual, so I'm a little lost I guess.
Tell me how to kick Myrkul Sendling's ass.