Dark Snake

Dark Snake is a medium to high priority pet. The improvement to the Inner Passion passive skill is very powerful but requires a large investment in units (60 total!) to maximise.

Hero Couple (Medusa)
Upon reaching 5* increases the range and power of the Medusa making it have some use in Outland Battle in place of other stronger units.

Acquisition
Spirit Highlands Pet Shop
 * 9-6 (1 Frag)
 * 16-15 (3 Frags)
 * 18-20 (3 Frags)
 * 22-1 (1 Frag)

Available for Gems, Guild Coins and Honor Coins.

Secret Shop

Available in the Secret Shop - 5 excess frags for 2 Dark Snake fragments.

Skill 3 - Awakens the hidden special ability of Senior Medusa

 * When first appearing, movement speed and attack speed of allies increases significantly for a certain period of time, while casting shield to become immune against physical attacks.
 * Basic game speed increases by 4%.
 * Increases attack range and movement speed by 5% and increases all unit's attack range, movement speed and critical hit rate by 5%.
 * Does not become stunned and is not interrupted by enemy attacks.
 * Curse duration of arrow attacks increases.
 * Inner Passion limit break : Inner passion max increases by 5 per Senior Medusa. (Maximum increase from Medusa/Dark Snake is 50)
 * Gold level limit of Medusa increase (Senior - 0, T1 - 20, T2 - 40, T3 - 60).
 * When included in team Medusa increases Medal buff by 50% More (T1 - 15%, T2 - 30%, T3 - 45%). These buffs are halved in the Time Shop.