The Ritual
Old magic, done with sound. Put a Ritual Pedestal down and four Singing Stones on its diagonals, exactly 3 blocks out each way: the stones lean in over it like claws.
Ritual circle
Drag to turn · wheel to zoom · floors count from the bottom; on the floor maps north is up.
Singing Stone4 Singing Stone × 4
Ritual Pedestal Ritual Pedestal × 1
The pedestal in the middle, four Singing Stones on the diagonals, 3 blocks away. Each stone plays one note of the recipe's chord.
Tune each stone to one note of the ritual’s chord (the order round the circle does not matter), put the offering on the pedestal (sneak + empty hand takes it all back) and strike the pedestal with a Hand Tuning Fork. The stones ring, light runs into the offering, and after about ten seconds it changes. Retune or break a stone and the ritual stops.
Resonant Shard: 4 amethyst shards, chord C-E-G-C. The shard is the way into the workshop: the crusher and the resonance chamber need it.
The pedestal needs a shard from a singing geode.