AD&D 2nd Monster Conversions rule of thumb

While the DN is final arbiter in any conversions, the simple guide below may be of help.  However, remember strike dice might be modified by player action so the Auto hit of a high level monster can be mitigated.

Monster rated in Hit Dice convert to Melee/Missile strike value by adding 10.

(Hit Dice) + 10 = Melee Strike Value.  Value or less to roll on 20d.

  • A 0 hit dice monster Strike Value of 10 (50% chance)
  • A 1 hit dice monster Strike Value of 11 (55% chance)
  • A 5 hit dice monster Strike Value of 15 (75% chance)
  • 10 hit dice monster Strike of 20 (100% chance)

The DN can increase or decrease the strike value at their whim to make monsters more or less dangerous for any given scene.

Monsters can also have an intrinsic Damage Reduction like player armor if DAR option is used

Monster Armor Class for Level/Damage Reduction

  • AC 10 = DAR 0
  • AC 5 = DAR 5
  • AC 0 = DAR 10