[Fragile] Ouroboros Circuit-Lv.50

When using Etheric Phantom to enter stealth, stealth duration is extended by 10s. After using EX Special Attack, gains the Viper Strike effect: When any Non-Corrode Bone attack hits an enemy, it triggers a free special Corrode Bone that cannot inflict Daze. This effect can be triggered once every 1s and lasts for 6s.