- This item is obtainable from Transcendence Decoder.
Based on the technology obtained from the research center at the time of the Lost City incident, you can use the sonic weapon produced by Gunsmith, Sonic Shot Attack using Sonic Energy, and Sonic Boom, an omnidirectional attack, and use special commands to use more powerful potential have.
- Private Erica's Exclusive Weapon.
- Transcendence Equipment Weapon.
- Crosshair is notified when the hit is successful.
- Unlimited spare magazines in scenario mode
- Special mode: Sonic boom right-click consumes 12 energy to use omni-directional shock waves
- Special Combination: Allegro <Sonic Shot> <Sonic Boom> <Sonic Shot> fires a powerful Sonic Wave in front of the trigger when continuously input.
- Special combination: Fortissimo <Sonic Shot> <Sonic Shot> <Sonic Boom> consecutively pushes enemies around the trigger and slightly regenerates the health of themselves and allies
- South Korea: 28 April 2020.
- China: 7 May 2020.
- TW/HK: 7 May 2020.
- CSN:S: 13 May 2020.
Second idle animation sound
A mode shoot sound
B mode shoot sound
Combo 1 shoot sound
Combo 2 shoot sound
- Psychic Harmonium is able to cancel Banshee's bats skill, Chaser Zombie's and Ganymede rush attacks. It can also knock away Rusty Wing's with ease.
- Every time a combo is used, it heals 300 player HP and 200 HP for the surrounding players.
- This gun is based on an organ and the sound it based on Bach, "Little" Fugue in G minor.
- Psychic Harmonium can disable Heavy Zombie’s trap ability and can save other players from this trap (Only Private Erica can use this ability, use Fortissimo to heal and get away from traps).