The Count Lucanor (UP)

This trophy is likely to kill you so I recommend you attempt it immediately after making a save. Pay attention to the fire spawn pattern and make your way through the flames. Take the right path when it forks and when you get to the path with three rows of flames, get into the middle as soon as possible, as that's where the next safe square will be. If you took any damage on the way to this safe square, then consider reloading your save and trying again. I personally got hit once before getting to the safe square but it was a close thing.

Once on the safe square, eat the bread in your inventory (if you've been exploring, you should have 2-3 pieces – one from the vent with the mirror in it near the kobold's letter room [must have given cheese to the goatherd in the beginning], one from Hans' house and at least another from chests/drawers) until you're at full health. Now make a mad dash to the letter chest, spamming to open the chest as soon as possible. Again, you're likely to die but as long as the screen showing the letter shows up, you will unlock this trophy.

For later reference: the bucket is in the green key door south of the garden. Set the switches to up / up / down / up – this will open the right most cell. In this cell is the bucket and two gold coins. Fill the bucket from the fountain in the garden.