Lydia the Deathsiren is the reward for fully completing Faction Wars (3 stars in all factions and stages) and what a reward she is. You will find her in most high damage teams due to her ability to place Decrease DEF and Weaken Debuffs at the same time as placing Increase Speed buff. She also setups poisoners with a Poison Sensitivity debuff. Quite the powerful champion! Below are the the list of known tunes that include Lydia.