Special levels
Between the ghost fight and the healing room you may enter a special level. There are no ghosts in most of them. Each is a small puzzle or challenge, and the same one never comes twice in a row. Dying in one is a normal death.
Crossing
Walk a zigzag path while four archers shoot arrows straight down. Slash arrows to cut them. Each hit costs one health. Defeat all four archers to finish.
Key hunt
A grid of pots hides a key. Breaking a safe pot shows how many of the touching pots are trapped, like Minesweeper. Trapped pots explode after a short warning. Find the key pot, take the key and walk into the gate.
Hint: the first pot you break is never a trap.
Torch order
Torches carry numbers. A lit torch adds its number and an unlit torch takes it away. The bar under the arena shows the running total, and a notch marks the number written on the door. Light and put out torches with your weapon until the total matches the door.
Torch chain
A row of torches. Hitting one flips it and its two neighbors. A row of digits under the gate shows the pattern you need, with 1 for lit and 0 for out. Match the pattern and the gate opens. There is no timer.
Echo floor
A grid of torches lights up in a sequence. Repeat the sequence by hitting the torches in the same order. A wrong hit restarts the stage. There are three stages and the sequences get longer.
Mirror slash
Turn mirrors by hitting them so the light beam from the wall reaches the lamp. Some mirrors are decoys. Later, some mirrors are linked, so turning one also turns its partner.
Rewards
Special levels pay a little Umbra and give your upgrades a rest from the fighting. They also let you heal in the healing room that follows.