Firewine Dungeon lies under Gullykin and the Firewine Bridge and serves as a shortcut, as long as the player can navigate through this tunnel in less time it takes when traveling from one to another it takes on the World Map. There are no loot chests in the Ruins. Only unidentified Fire Arrows, from the Kobold Commandos, and the spell scrolls from Lendarn. But that includes Cloudkill.
The compass orientation of the exits in the Ruins is opposite to their alignment above ground in Gullykin. North exit leads to Jenkal's house, next to Jenkal, if he is still alive. North of Jenkal's house is the Winery and Temple, and inside that building is where the stairs from the south Ruins exit lead.
There are only two subquests which can be completed.
- Getting armor from the Undead Knight at 1450, 360 (and either taking it to the Ghost Knights at 730, 985, for 1500XP, or using it to make the Vampiric Sword that damages its user and heals the target.)
- Killing the Ogre Mage who has been directing the Kobolds to attack Gullykin, and Lendarn. The Ogre Mage does not have much in the way of loot, but Lendarn has a Mage Robe of Electrical Resistance, a Potion of Power, a Potion of Stone Form, and spell scrolls: Chill Touch, Fireball, Lightning Bolt, and Cloudkill.
There are also, and only, two things standing in the way of those objectives, other than Lendarn & co. themselves: Traps, and respawning Kobold Commandos shooting Fire Arrows.
Monsters in Baldur's Gate cannot respawn if the player or companions have the respawn point in line of sight. This can be used to advantage.
When the party gets to one of the 'R' respawn points on the map above, park a character there until the party reaches the next one, and so on.
The Undead Knight is hostile, but gives a speech before attacking; the Ancient Armor weighs 15 lbs.