A Secret Passage!
Not too bright
Szartharrax managed to intimidate the kobold Skull Kicker tribe into swearing allegiance to him by eating or driving off all the other kobold tribes in the area. Szartharrax had an appetite for gold and he demanded tribute from his servants. Fear of the dragon’s anger drove the kobolds in the Kobold Hall to attack trade caravans passing through the area and use the loot to keep Szartharrax pleased.
Szartharrax met his demise when five adventurers looking for a stolen green dragon hide showed up. He thought he could ambush them and maybe eat them for lunch, but his slow wits only got him killed and his organs harvested for later use in rituals.