Type-004VZ Hydra

"Holy heck! That's a Type-004VZ Hydra! A zombie hydra that's infused with the WhiteKnight Virus and it's a zombie version of the Dark Elves' own version of Hydras. They're all giant undead versions of them, which they're all created by the Vietnamese Zombie Army and the Army of the Republic of Vietnam Umbrella Troopers. We can stop 'em... if we don't get consumed either by acid... or by a bite."

--Su Ji-Hoon, A Hydra of Nightmares

The Type-004VZ Hydra is the zombie hydra infused with the WhiteKnight Virus,was the Shellshock 2 zombie version of Hydra (H5) and was giant undead hydra was created by VZA.

Only happened when VZA and ARVN Umbrella Troopers upgrade it that it could use ranged attack by firing acid,can melee attack by bite at enemies

Also,it can kill many enemies by acid attack but it will be only have a weakness :  burn the wound of the heads that had just been cut so that the new heads could not grow like real Hydra.