you cause 4 + 1d4 hd of creatures to fall into a comatose slumber, beginning with those with the fewest hd
abbrevation for [hit die]/[hit dice] used in the dungeons & dragons role-playing game
"you cause 4 + 1d4 hd of creatures to fall into a comatose slumber, beginning with those with the fewest hd" What is the definition of "hd"?