Imperial Tomb has a Java Adena quest, where you can collect 1000 relics (one monster drop 7 of them) and exchange them talked with Ghost of Adventurer for 200 Java Adena and random count (1-10) Mid, (1-6) High and (1-2) Top Life Stones.
The monsters are not strong, so if you like to mass farm mobs, this can become one of your favorite zone, as even without the quest, mobs have a small chance of dropping Life Stones.