Nyx is an S-rarity hero from the Wings of Dawn faction, and she’s an Attack-type.
You can unlock her by getting the Warrior Battle Pass or through other special offers.
Rarity: 
Type: Attack 
Faction: Wings of Dawn 
Attack: 16,628
Defence: 13,491
Troop Size: 506
Skills
Spirit Doll
” Controls 4 self-destructing puppets that track and attack enemies, dealing damage (Damage Factor: 1200, upgraded to 1241).”
Type: Active Skill
Upgrade Preview:
Star Level 1: Increases damage factor by an additional 150.
Star Level 2: Puppet quantity +1.
Star Level 3: Increases damage factor by an additional 150.
Star Level 4: Puppet quantity +2.
Star Level 5: Increases damage factor by an additional 300.
Witchcraft Attack
“ The damage of normal attacks increases from 900 to 920.”
Type: Normal Attack
Upgrade Preview:
Star Level 1: Increases damage factor by an additional 90.
Star Level 2: Increases damage factor by an additional 90.
Star Level 3: Increases damage factor by an additional 90.
Star Level 4: Increases damage factor by an additional 120.
Star Level 5: Increases damage factor by an additional 210.
Mind Control
“Increases the defense of Shooters in the troop by 15% (upgraded to 16%).”
Type: Global Effect
Upgrade Preview:
Star Level 1: Shooter ATK +5%.
Star Level 2: Shooter ATK +5%.
Star Level 3: Shooter ATK +10%.
Star Level 4: Shooter ATK +10%.
Star Level 5: Shooter ATK +15%.
Potential Unleashed
“The hero’s attack and defense increase by 10%, and troop capacity increases by 5%.“
Type: Exclusive Talent