Enemy list
Chest list
The Cave of Mysidia is a 5-floor dungeon with 19 chests and hidden walls on B2, B3, and B5. A doppelganger blocks B1 until you use the Black Mask. The Crystal Rod at the bottom unlocks the Mysidian Tower.
Journey to the Cave
Head back to Mysidia first. Rest at the inn and restock on healing items. Make sure you have the Black Mask from Tropical Island.
Leave Mysidia and head east around the mountains. When you see an opening, take it and follow until you see some mountains with a cave entrance below.
Cave of Mysidia
Hidden walls on almost every floor. The video below shows the full route through all 19 chests.
B1. Go left immediately to the end, then down the steps for Chest 1 (Gold Hairpin). Head back and take the first south path, then right to some steps for Chest 2 (Black Garb). Go up the stairs and left, follow the path south and down the next set of steps. A strange creature blocks your way; use the Black Mask on it to proceed. Take the steps down to B2.
B2. Up the steps and right at the end for Chest 3 (Power Staff). Continue up and right, then down. Chest 4 (Flame Lance) requires a hidden wall; the 3rd wall from the bottom lets you through. Grab it and head to the bottom-left corner to find the door to B3.
B3. Up the steps and left. Another hidden wall here, 4th from the bottom above the long wall. Walk through for Chest 5 (Ice Bow), then back out and south. Take the first right and follow it around to Chest 6 (Ogrekiller), which has monsters inside. Continue south past the first door and take the second door to B4.
B4. South, up the steps, then left. Follow it around to the top-right corner for Chest 7 (Potion). Head south to three doors and take the middle one for Chests 8-10 (Phoenix Down, Bell of Silence, Gold Needle). Exit and go south to the stairs leading to B5.
B5. Chest 11 (Drain Tome) is on your right with monsters inside. Go south to the bottom and right, then head north along the right wall. There's a hidden wall just before the grass ends; walk through for Chest 12 (Mini Tome), then north for Chests 13-16 (Potion, Ether, two Hi-Potions). Exit the hidden area and continue north around the room. The door at the end holds Chests 17-19: Drain Tome, Crystal Rod, and Osmose Tome. Teleport out.
