In *Wuthering Waves*, the Sonance Casket: Ragunna is a valuable material found in Rinascita, holding echoes of the past. These can be easily collected using the Grapple Utility in various locations throughout Rinascita.
Trade your collected Sonance Caskets: Ragunna with the Tweensy Weensy merchant in the Garden of the Lost for rewards such as Astrite, Casket Sonnar Use Permit: Rinascita, Resonance Potions, Energy Cores, Plushie Village Restoration Log, and Shell Credits.
Sonance Casket: Ragunna Locations in Thessaleo Fells
Sonance Casket: Ragunna Location #1
Northeast of the Rinascita-Ragunna-Thessaleo Fells Resonance Nexus.
Sonance Casket: Ragunna Location #2
Teleport to the Rinascita-Ragunna-Thessaleo Fells northern Resonance Beacon. Head west towards the Dream Patrol: Sprawling Scarlet challenge, climb the wall, and jump to collect the casket.
Sonance Casket: Ragunna Location #3
From Location #2, use the Wingray to fly to the top of the Resounding Rise Tower.
Sonance Casket: Ragunna Location #4
Fly from the Resounding Rise Tower to the Twilight Rise Tower; the casket floats above it.
Sonance Casket: Ragunna Location #5
Fly from the Twilight Rise Tower towards the Command Rise Tower bridge.
Sonance Casket: Ragunna Location #6-7
Inside the Command Rise Tower. Accessible during or after the Shadow of the Towers: Command Rise Sub-Quest.
Sonance Casket: Ragunna Location #8
After completing the Shadow of the Towers: Command Rise Quest, fly down from the top of the Command Rise Tower, or climb down from the ground.
Sonance Casket: Ragunna Location #9
Teleport to the Twin Peaks southern Resonance Beacon.
Sonance Casket: Ragunna Location #10
Go to the bridge, leap off, and fly underneath to collect the casket.
Sonance Casket: Ragunna Location #11
West of the Ragunna-Thessaleo Fells-Twin Peaks northern Resonance Beacon.
Sonance Casket: Ragunna Location #12
From Location #11, move southwest, leap off the cliff, and go to the golden-winged horse statue.
Sonance Casket: Ragunna Location #13
On top of Porto-Veno Castle (use the Grapple Utility or climb).
Sonance Casket: Ragunna Location #14
Northwest of the Resonance Beacon west of Porto-Veno Castle, under the Dream Patrol: Auto Handpuppet challenge.
Sonance Casket: Ragunna Location #15
Above the Tweensy Weensy Plushie merchant at the Ragunna-Thessaleo Fells-Garden of the Lost Resonance Beacon.
Sonance Casket: Ragunna Location #16
Southeast of the Twin Peaks northern waypoint; leap off the southeastern cliff and glide to the broken bridge. 
