Teardrop right now is a random drop with 25% chance from a Knife Juggler on the Slave Auction Island.
We recognize that this is an issue right now but due to the time-constraint, we had to sacrifice balancing in order to spend time on finishing the whole game first. All this will be fine tuned after the game is done.
The unique on the Slave Auction Island will also appear somewhere else later, so that you still be able to get items from them after you cleared the dungeon.
- Punipen