Petra

Overview

Petra's Burst (factor 16,000, 17,000 awakened) also raises her counterattack damage for 5 seconds. Blood Resonance gives bonus damage to debuffed enemies, and the bonus triples when she is deployed with Karl (up to +30% damage and -10% damage taken for Berserkers). Iron Wall Formation adds Berserker HP and damage. Dual-Sided Command only works above 13.5M damage per second, so it rarely matters.

When to use Petra

Berserker marches with Karl in PvP, rallies and garrison counters.

Troop: Berserkers.

Petra skills at max level

1. Counterattack Overture Burst

   One-time strike that also raises her own counterattack damage for 5 seconds.

   Damage factor 4,800 / 6,400 / 8,000 / 11,200 / 16,000; counter 9% / 12% / 15% / 21% / 30%

2. Dual-Sided Command Passive, unlocks at 2 stars

   Only when the troop deals over 13.5M damage per second: as commander, reduces damage of hit targets for 2 seconds; as lieutenant, grants one heal.

   Reduction 2% / 3% / 4% / 6% / 8%; heal factor 720 / 960 / 1,200 / 1,680 / 2,400

3. Iron Wall Formation Passive, unlocks at 3 stars

   Raises HP and damage of Berserker soldiers.

   HP 3% / 4% / 5% / 7% / 10%; damage 0.5% / 1% / 2% / 3% / 4%

4. Blood Resonance Passive, unlocks at 4 stars

   Bonus damage to debuffed enemies. When deployed with Karl, the bonus is larger and Berserkers take less damage.

   Base 3% / 4% / 5% / 7% / 10%; with Karl 9% / 12% / 15% / 21% / 30% and damage taken -3% / 4% / 5% / 7% / 10%

5. Tidal Counterforce Awakened

   Awakened Overture: factor 17,000, counter damage +50% for 5 seconds, and counterattacks have a 50% chance to drain 30 rage.

Values are levels 1 to 5 from the in-game Upgrade Preview. Skills 2, 3 and 4 unlock at 2, 3 and 4 stars; maxing every skill awakens the hero and unlocks the awakened skill.

Best pairings for Petra

Karl + Petra is a coded synergy: Karl's Burst applies HP Reduction, which turns on her debuffed-enemy bonus.

Highest combined damage and survivability score for Petra in the max-level model:

CommanderPetra + LieutenantKalthas

Scored on damage per second times effective HP. The pairing note above favours raw damage where it differs.

Build: Petra Blood Resonance lieutenant

Lieutenant for Karl; level Blood Resonance first because it is the skill that names him.

Skill priority: Blood Resonance, then Iron Wall Formation, then Counterattack Overture, then Dual-Sided Command.

Strengths: Large Burst (17,000 awakened) plus Berserker HP and damage.

Weaknesses: Much weaker without Karl.