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

Physical Team Supporter & Shock Attacker

Karl Heron possesses multiple support effects for Attack-type Heroes, and when a team with 3 or more Attack-type Heroes is formed, he can target and weaken the enemy with the highest Attack using Lightning Marks. He is a recommended supporter and Shock attacker for Physical teams.

6 Transcendence Recommended for PvP

At 2 Transcendence, his Shock probability increases, and at 6 Transcendence, he can grant 2 instances of All Damage Nullification, Debuff Removal, and a Physical Damage Boost to Attack-type allies upon Revive. He is a Hero you'll want to aim for 6 Transcendence with if using in PvP, as his 6 Transcendence effect is exceptional.

Passive Skill Enhancement Recommended

Enhancing the Passive Skill increases his HP upon Revive from 80% to 100% and his Incoming Healing Reduction from 44% to 52%. The former provides a survivability boost, while the latter is a high priority as it exceeds the reduction values of Ace and Reginleif, who have similar effects.

Tips!	If using him in PvE, the increased Physical Vulnerability effect from enhancing Skill 1 is also useful.

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.

Best Build for Karl Heron

Recommended Equipment Sets

Set	Reason for Recommendation
Spellweaver	- Increases Shock application rate - Ideal for Shock-specialized builds
Vanguard	- Increases Shock damage - Can draw attacks from enemy Kyle and Karl Heron
Bounty Tracker	- Balancing Weakness Hit and Crit is crucial for PvP attackers - Best if focusing on Weakness Hit
Assassin	- Balancing Weakness Hit and Crit is crucial for PvP attackers - Best if focusing on Crit
Gatekeeper	- Increases durability to support allies for long durations - Best for support-main roles

Recommended equipment for Karl Heron changes depending on whether you use him as a Shock attacker, a damage-focused attacker, or a support specialist. Choose your equipment according to your current operation policy.

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 his potential. Since increasing Attack also boosts Shock damage, these are especially compatible options.

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

Raising Attack with Vanguard increases Shock damage and allows him to draw attacks from enemy Kyle and Karl Heron while mitigating them with damage immunity. Focus on increasing Effect Hit Rate via options to boost the Shock infliction rate as well.

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 (%) - Critical Damage Dealt - Effect Hit Rate - Effect Resistance

If you want to use him as a damage attacker by utilizing his buffs and debuffs, the Bounty Tracker set is a great choice to focus on Weakness Hit Chance and Crit Rate. Since it is crucial for Physical teams to take the first move, be sure to increase his Speed significantly as well.

Assassin Set (Critical Type)

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

The Assassin set is another option for a damage-focused build. The Bounty Tracker set is effective in environments with many block (durability) heroes, while the Assassin set becomes more valuable in environments with heroes like Rin who reduce Weakness Hit Chance.

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 his durability with the Gatekeeper set to stay on the field as long as possible. We recommend either fully specializing in durability options or balancing it with Effect Hit Rate and Attack for Shock utility.

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% [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)
7 or Higher	：Limited Effect Increases All Attack, Defense, and HP by 2%

Stage	Effects
T1	Increases All Attack by 12%
T2	Increases All Attack by 6% [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%

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%.

Karl Heron's Profile

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