Hydra (From "Cytus II")
Akira Complex, James Landino
HYDRA
MYTH & ROID
Hydra
Covet
Summertime Sadness
Within Temptation
Paradise (What about Us)
Within Temptation, Tarja
HYDRA(OVERLORD Ⅱ ED) 圈9.ver（Cover MYTH & ROID）
圈9
Covered by Roses
Within Temptation
紫陽花の夜
ねじ式, GUMI
Dangerous
Within Temptation
HYDRA
狐妖Mikan
And We Run
Within Temptation
hydra (long edit)
Betwixt & Between
Dog Days
Within Temptation
Hydra
aran
Let Her Go
Within Temptation
Hydra
James Landino, Akira Complex
HYDRA (Sped Up)
LXNGVX, DJ FKU
Hydra
NGC 2244
Tramp Like You
Oracle Sisters
HYDRA
LXNGVX, DJ FKU
装*(Hydrax Remix)
Hydrax
Silver Moonlight
Within Temptation
Hydra
F-777
Let Us Burn
Within Temptation
Edge of the World
Within Temptation
Hydra
R. Armando Morabito, Julie Elven, Tina Guo
Whole World is Watching
Within Temptation
Hydra
庄司英徳
HYDRA（piano ver.）
琳依
Hydra
ARTIN, Revealed Recordings