u/atoms-wrath

Alright so what is going on with the zombie green dragon in Siege of Shadowdale? This thing has a ton of hit points and spell resistance. With a fighter/cleric in full plate, tower shield, ring of protection, divine favor, mage armor, barkskin, clarity, potion of heroism, and necklace of acid resistance I couldn't beat this thing. Then I realized it can't leave the stone circle so I used a bow and shot it while it stood there. Took 40 arrows.

Is there some other way that you're supposed to kill this thing that I just missed? Is this supposed to be a joke encounter? I doubt this is the intended way to do this.

From what I understand the Discipline skill is mainly used to prevent Knockdown. Do any enemy NPCs or creatures actually use Knockdown though? Is this skill actually worth investing in?