Karl Heron - Rating & Skills

Karl Heron is a Mythic character in Seven Knights Re:BIRTH. Learn about Karl Heron's best builds, rating, tier, Transcendence effects, and skills.

Karl Heron Rating & Stats

★4	★5	★6
Daybreak Mercenaries	Wandering Mercenary	Double Spear Hunter

Karl Heron Rating & Tier

Arena Total War					Guild War
Advent Expedition		Nightmare Farming		Castle Rush		Raid (Lv .10+)		Infinite Tower
				-		-
Review
- Recommended Shock attacker and support for Physical parties - Can target and attack the enemy with the highest Attack - Strong Attack-type support effect upon Revive - Excellent Crit Damage Boost, Physical Damage Boost, and Physical Vulnerability - Best used in a party with 3 or more Attack-type heroes

Support Role and Shock Attacker for Physical Teams

Karl Heron has multiple attack-support effects, and with 3 or more Attack-type heroes in the party, the Thunderbolt Mark lets him target and attack or weaken the enemy with the highest attack. A recommended supporter and Shock attacker for physical teams.

User Score

Karl Heron Stats

* Each stats is based on the max level in the Codex, with enhancement +5 applied.

Karl Heron Strength and Features

Excellent Thunderbolt Marker Effects

Forming a team with 3 or more Attack-type Heroes applies the Thunderbolt Marker to the enemy with the highest Attack at the start of battle, reducing their Crit Rate and Weakness Hit Chance.

He prioritizes attacking the marked character during his attacks, and his ability to deal additional Fixed Damage and apply Shock is exceptional.

Powerful and Diverse Support Effects

Notable Durability

He is hard to damage early in the battle thanks to his 2-turn Damage Immunity. He also possesses a Revive skill and prevents being taken out immediately by gaining 3-time Damage Nullification upon revival. Surviving for even longer is possible by equipping a Ring of Immortality or Ring of Authority.

Attacks Lack Impact Outside the Marker Target

Karl Heron's drawback is that the Thunderbolt Marker only affects one person. After other characters are targeted or the marked enemy is incapacitated, his skill effects outside of his passive can feel insufficient.

Since his Physical Damage Boost lasts only 3 turns, he is a Hero recommended for quick, decisive battles.

Vs. Karl Heron Guide

Redirect the Marker to a Different Hero

Since the Marker is applied to the Hero with the highest Attack, boosting a non-main attacker's Attack to the highest in the party to redirect the Marker is the recommended counter. Adjust your party's Attack distribution through equipment and formations.

Best Build for Karl Heron

Recommended Equipment Sets

Set	Reason for Recommendation
Spellweaver	- Increases Shock application rate - Best for Shock-specialized builds
Vanguard	- Increases Shock damage - Can attract attacks from enemy Kyle or Karl Heron
Bounty Tracker	- Balancing Weakness Hit and Crit is important for PvP attackers - Best when focusing on Weakness Hits
Assassin	- Balancing Weakness Hit and Crit is important for PvP attackers - Best when focusing on Crit
Gatekeeper	- Increases durability to support allies for longer durations - Best for specialized support roles

For Karl Heron, the recommended equipment changes depending on whether you intend to use him primarily as a Shock attacker, a DPS attacker, or a support specialist. Choose your equipment based on your current team strategy.

Spellweaver Set (Shock Application Type)

Set	Main Stat Candidates	Substat Candidates
Spellweaver	[Weapon] - Effect Hit Rate - All Attack (%) [Armor] - All Attack (%) - Block Rate	- Speed - Effect Hit Rate - All Attack (%) - Effect Resistance - Block Rate - Crit Rate - Weakness Hit Chance

When using the Spellweaver set, it is recommended to focus on increasing Effect Hit Rate and Attack to maximize performance. Since increasing Attack also boosts Shock damage, these stats are highly compatible.

Vanguard Set (Shock Damage Type)

Set	Main Stat Candidates	Substat Candidates
Vanguard	[Weapon] - All Attack (%) - Effect Hit Rate [Armor] - All Attack (%) - Block Rate	- Speed - All Attack (%) - Effect Hit Rate - Effect Resistance - Block Rate - Crit Rate - Weakness Hit Chance

Increasing Attack with the Vanguard set boosts Shock damage and allows him to attract attacks from enemy Kyle or Karl Heron while mitigating them through Damage Immunity. We recommend raising Effect Hit Rate through options to further improve the Shock application rate.

Bounty Tracker Set (Weakness Hit Type)

Set	Main Stat Candidates	Substat Candidates
Bounty Tracker	[Weapon] - Crit Rate - Weakness Hit Chance [Armor] - All Attack (%)	- Speed - Weakness Hit Chance - Crit Rate - All Attack (%) - Crit Damage Dealt - Effect Hit Rate - Effect Resistance

If you want to utilize his buffs/debuffs as a DPS attacker, focusing on Weakness Hit Chance and Crit Rate with the Bounty Tracker set is a viable choice. Since it is crucial for physical teams to take the initiative, be sure to prioritize increasing Speed as well.

Assassin Set (Critical Hit Type)

Set	Main Stat Candidates	Substat Candidates
Assassin	[Weapon] - Crit Rate - Weakness Hit Chance [Armor] - All Attack (%)	- Speed - Weakness Hit Chance - Crit Rate - All Attack (%) - Crit Damage Dealt - Effect Hit Rate - Effect Resistance

The Assassin set is another excellent option for a DPS attacker build. While Bounty Tracker is effective in environments with many tanky heroes relying on Block, the Assassin set is better against opponents like Rin who possess Weakness Hit Chance reduction.

Gatekeeper Set (Support Type)

Set	Main Stat Candidates	Substat Candidates
Gatekeeper	[Weapon] - Effect Hit Rate - All Attack (%) - HP (%) [Armor] - Block Rate - Damage Taken Reduction - All Attack (%)	- Speed - Block Rate - Effect Hit Rate - All Attack (%) - Effect Resistance - HP (%) - Defense (%)

When adopting him for support purposes, it is viable to increase durability with Gatekeeper to stay on the field as long as possible. We recommend either specializing fully in durability options or focusing on his utility by raising Effect Hit Rate and Attack for Shock potential.

Best Rings for Karl Heron

Legendary Rings

Best Rings to Equip
Ring of Resurrection	Ring of Immortality	Ring of Authority

Since Karl Heron has low durability once his Damage Immunity or Damage Nullification expires, the Ring of Immortality is recommended, and the Ring of Authority is also useful as the next best option. While the bar is high, Fixed Refining between Immortality and Authority will further increase his survivability.

Karl Heron's Skills

Tap to jump to each skill description
▼Basic Attack	▼Skill 1	▼Skill 2	▼Passive Skill

Normal Attack

Skill 1: Lightning Beam

Skill 2: Heavens' Wrath: Reformed

Passive： Master of the Twin Spears

Karl Heron - Enhancement & Transcendence

Karl Heron Enhancement Priority Quick Reference Table

Potential	Transcendence	Skill Enhancement

For Potential and Transcendence, it is recommended to prioritize heroes at the top of the Best Hero Tier List who are versatile across all content. Since resources for Skill Enhancement are limited, choose the order of enhancement by comparing them with heroes of similar priority.

Karl Heron - Recommended Hero Potentials

Potential	Priority/Remarks
Attack	：Prioritize Enhancement Not the top priority, but this stat has a strong impact on win rate and scores.
Defense	：Enhance When Possible The impact is minor, but enhance this when you have spare resources to improve your win rate and scores.
HP	：Enhance When Possible The impact is minor, but enhance this when you have spare resources to improve your win rate and scores.

To unlock a Legendary Hero's Potential, a total of 3,000 Heart's Fires and 180 corresponding Uncommon Rank Up Materials are required per stat.

Karl Heron - Recommended Transcendence

Transcendence Level	Recommendation / Effect
Transcendence 2	：Excellent Effect Increases All Attack by 6% [Basic Attack] [Single Enemy (Thunderbolt Mark)] Increases Chance: Shock chance becomes 30%. [Skill 1] [Single Enemy (Thunderbolt Mark)] Increases Chance: Shock chance becomes 50%. [Skill 2] [(Single Enemy (Thunderbolt Mark)] Increases Chance: Shock chance becomes 50%.
Transcendence 4	：Excellent Effect Increases Crit Rate by 18%
Transcendence 6	：Extremely Powerful Effect Increases All Attack by 6% [Passive Skill] [Allies (Attack))] Adds Effect: Grants All Damage Nullification upon revival. [Ends After: Taking 2 Hit(s)] [1 Time(s) per Battle] Effect Addition: Upon Revive, Debuff Removal 2 (Activates 1 times per battle) Effect Added: Physical Damage Boost 19% upon Revive [3 turns duration] (Activates 1 times per battle)
Transcendence 7-12	：Limited Effect Increases All Attack, Defense, and HP by 2%

The 2nd Transcendence increases Shock Effect Probability, and the 6th Transcendence enables all damage to be negated twice, Debuff Removal, and a Physical Damage Boost for all Attack-type allies upon Revive. The 6th Transcendence effect is excellent, so if you use this hero in PvP, aim for 6th Transcendence.

Stage	Effects
T1	Increases All Attack by 12%
T2	Increases All Attack by 6% [Basic Attack] [Single Enemy (Thunderbolt Mark)] Increases Chance: Shock chance becomes 30%. [Skill 1] [Single Enemy (Thunderbolt Mark)] Increases Chance: Shock chance becomes 50%. [Skill 2] [(Single Enemy (Thunderbolt Mark)] Increases Chance: Shock chance becomes 50%.
T3	Increases HP by 18%
T4	Increases Crit Rate by 18%
T5	Increases All Attack by 12%
T6	Increases All Attack by 6% [Passive Skill] [Allies (Attack))] Adds Effect: Grants All Damage Nullification upon revival. [Ends After: Taking 2 Hit(s)] [1 Time(s) per Battle] Effect Addition: Upon Revive, Debuff Removal 2 (Activates 1 times per battle) Effect Added: Physical Damage Boost 19% upon Revive [3 turns duration] (Activates 1 times per battle)
T7	Increases All Attack, Defense, and HP by 2%
T8	Increases All Attack, Defense, and HP by 2%
T9	Increases All Attack, Defense, and HP by 2%
T10	Increases All Attack, Defense, and HP by 2%
T11	Increases All Attack, Defense, and HP by 2%
T12	Increases All Attack, Defense, and HP by 2%

Transcendence Guide

Karl Heron - Recommeded Skill Enhancement

Skill	Priority/Effects
▲Basic Attack	：Fine Unenhanced Increases Damage: To 120% of Physical Attack.
▲Skill 1	：Enhance if You Use It Increases Effect: Physical Vulnerability to 28%.
▲Skill 2	：Enhance if Possible Increases Chance: Shock chance becomes 35%.
▲Passive Skill	：Enhance if You Use It Increases Effect: HP gained upon revival becomes 100%. Increases Effect: Incoming Healing Reduction to 52%.

Enhancing his Passive Skill increases Revive HP from 80% to 100% and raises his Incoming Healing Reduction value from 44% to 52%. The former improves survivability, and the latter — surpassing the Incoming Healing Reduction values of Ace and Reginleif who share the same effect — makes it a high priority.

Tips!	When using him in PvE as well, the Physical Vulnerability boost from Skill 1 enhancement is especially useful.

Karl Heron's Profile

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