Extra Heroes - Seven Knights Idle Adventure
Extra heroes are the weakest hero category in Seven Knights Idle Adventure, introduced solely to enrich your Codex. Unlike Legendary or Awakened heroes, they are not designed for combat — their role is exclusively to complete the Codex and be leveled up to earn permanent rubies and stats. This page lists all available Extra heroes and the associated Codex rewards.
Guide — "What should I do with these Extra heroes?"
Extra heroes (with one exception) have no combat value. Even if they did, they cannot exceed level 50 and have virtually no access to any boosting systems (accessories, equipment, etc.).
Honestly — level them up only for the Codex.
How does the Codex work exactly?
When you obtain the hero, you get 150
You receive rubies and unlock stats every 10 levels your hero gains, or whenever your hero gains 1 star.
Ruby rewards start at 150 and increase by 50 at each tier.
For example, a level 10 hero earns you 150, and a level 20 hero earns you 200.
How do you obtain Extra heroes?
Extra heroes, despite being the weakest heroes in the game, cannot be obtained through the standard summon system. You can acquire them by leveling up your Monster Essence levels, from Chaos Ruins chests, or in the Arena shop.
Extra hero Summon ticket
You don't get the extra heroes directly; you have to collect summoning tickets. Each time you open a ticket, you'll receive one of the extra heroes at random.
Which Extra heroes should you prioritize?
Priority is based on the stats they grant in the Codex. Here is the priority order:
Accuracy → Crit Damage / Attack → Other stats
As covered in the stats article, Accuracy is almost always the top priority across all game modes.
Who to prioritize between an Extra hero and a higher-tier hero granting the same Codex stat?
Always prioritize the higher-tier hero. For example, comparing an Extra-tier hero boosting Accuracy vs. a Unique-tier hero: the Extra tier gives 0.6% at the first threshold, while the Unique tier gives 0.9%.
Heroes List
| Hero | Class | Kit description | Playable? |
|---|---|---|---|
 | Support Type | Bind Immunity (team) | No |
 | Support Type | Poison Immunity (team) | No |
 | Ranged Type | High single-target damage (690%) | No |
 | Support Type | +12% Crit Damage to Ranged Type | No |
 | Melee Type | +12% Crit Rate (self only) | No |
 | Support Type | Knock Back Immunity to allies | No |
 | Defense Type | Self-Immortal (6 sec once) | No |
 | Support Type | +12% Evasion to Ranged Type | No |
 | Support Type | +15% Attack to Defense Type | No |
 | Support Type | +12% Reduction Rate to Defense allies | No |
 | Melee Type | Frostbite Immunity to allies | No |
 | Melee Type | +12% Weakness Attack Rate, +12% Weakness Dmg | No |
 | Ranged Type | +15% Attack, +12% Attack Speed to allies | No |
 | Melee Type | -30% Accuracy Decrease | No |
 | Defense Type | Self-Veil (6x nullify) | No |
 | Melee Type | Taunt Immunity (self) | No |
 | Ranged Type | Burn Immunity (self only) | No |
 | Melee Type | Melee-type bonus damage (+30%) | No |
 | Melee Type | Self-Stealth (8 sec) | No |
 | Support Type | +15% Attack to Support Type | No |
 | Defense Type | Taunt control, Self-Evasion +30% | No |
 | Support Type | Curse Immunity (team) | No |
 | Support Type | Sleep Immunity (team) | No |
 | Ranged Type | AOE Burn DoT (20% Atk/sec) | No |
 | Defense Type | Knock Back control effect | No |
 | Ranged Type | Self-Stealth (8 sec) | No |
 | Support Type | Heal (30% HP) + +12% Attack Speed | No |
 | Support Type | +12% Movement Speed to allies | No |
 | Ranged Type | 1.8 sec Paralysis control | No |
 | Support Type | Permanent +20% Movement Speed aura, zero maintenance | Yes |
 | Defense Type | Self Defense Increase (+15%) | No |
FAQ
When should you start leveling these heroes?
Around mid-game, when you start having a steady supply of hero experience that lets you craft all "Hero Strengthening Stones" in Elke's Cauldron every day — use the surplus to level up Extra heroes. Start with higher-tier heroes, as they provide better rewards.
Should you max them out or just unlock them?
The first step is to unlock them, but as soon as you can, level them to the maximum — it's not expensive since they are capped at 50.
How many Rubies can you earn by completing all Extras?
By unlocking all Extra heroes you earn 4,650. By leveling them all to level 50, that's an additional 38,750.
Is there a playable hero among the Extras?
Why did Netmarble create this category?
Given how difficult these heroes are to obtain compared to their usefulness, it's clear the intent was to create a pure hero collection system.
Is it really worth leveling a hero just for Codex stats?
Honestly, yes. At the start of the game it may seem like a huge investment, but the further you progress, the less hero experience will be an issue. For a level 50, 10-star hero granting Accuracy in the Codex, you still gain a passive 12% Accuracy.
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