Unlocked after completing Chapter 6 of the main story, a Gray Demon can be summoned by filling up the Death Match meter in Boss Battles. It is the main source of Gray Demon’s Wing, a material used to Limit Break heroes to Level 70 and above.
Gray Demons can fly and are invulnerable against melee attacks on the duration of the flight buff. Unlike the Red Demon, it cleanses all debuffs at the start of its turn which renders all crowd-control effects such as Freeze and Petrify to be useless.
Gray Demon: Basic Info
- Attribute:
Speed
- Weak to
HP-type and strong against 
Strength-type heroes
- Weak to
- Weak to Fairies and strong against Giants
- King’s “Bad Blood” with the Gray Demon decreases the boss’ damage by 30%.
- Immune to Debuff and Dissolve. Crowd-control and Ultimate Move Gauge depletion don’t affect the Gray Demon.
- Melee attacks are ineffective while the Flight Buff is active (only ranged attacks work). Melee attacks are effective when the enemy is stunned from falling.
Flight Buff Pattern
| Normal | Phase 1: Starts the battle in a flying state with a green flight gauge. When depleted, causes the Gray Demon to fall on the ground and get stunned for 1 turn. |
| Hard | Phase 1: Starts the battle in a flying state and lands on the ground alternatively after 3 turns. |
| Extreme | Phase 1: Starts the battle in a flying state and lands on the ground alternatively after 3 turns.
Phase 2: Starts the battle in a flying state with a green flight gauge. When depleted, causes the Gray Demon to fall on the ground and get stunned for 1 turn. |
*Flight gauge
Stats
| Normal | Hard | Extreme | |
| Level | 110 | 150 | 190 |
| Recommended CC | 100,000 | 140,000 | 180,000 |
| Stamina Required | 16 | 20 | 24 |
| Attack | 7,854 | 10,593 | 14,264
16,716 |
| Defense | 3,450 | 4,650 | 5,850
7,760 |
| HP | 184,660 | 293,580 | 366,380
409,360 |
Strategy and Team Composition
Each demon has its unique trait and applies a certain strategy to defeat it. While the trick for Red Demon requires constant crowd-control, Gray Demon can be conquered using these various approaches:
Burst
*Highly Recommended
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| Damage | Buff | Skill-up | Sub |
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| Damage | Buff | Skill-up | Sub |
Ult-Rush
*Safe team for beginners without a Green King
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| Heal / Ult Charge | Buff | Skill-up | Sub |
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| Heal / Ult Charge | Barrier / Ult Charge | Skill-up | Sub |
The most effective strategy is to build around Green King since he is the strongest attacker against the Gray Demon. Accompany with Green Helbram / Green Gilthunder as attack buffer and add Red Gowther for skill-ups to maximize the damage output.
| Hero | Role | Details | Get From |
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Attack | Deals bonus damage being a hero with HP attribute and Fairy race.
His unique ability to increase Crit Chance for each Ultimate Move Gage orb allows him to Crit most of the time. Use basic skills first to keep a high Crit bonus before using his Ultimate. |
Coin Shop
Hero Draw |
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Skill-up | Primarily used to skill-up your buffer and attacker’s cards. Green King can deal a lot of damage with a level 3 attack buff from Green Helbram / Green Gilthunder.
His unique ability adds bonus damage if the Hero doesn’t take damage during the boss’ turn, especially when protected by Green Merlin’s barrier. |
Coin Shop
Hero Draw |
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Buff | His buff is used to boost your team’s attack related stats.
Works hand-in-hand with Red Gowther to easily rank up his buff to level 3. Maximize buff effects by using him while the other team uses Green Gilthunder. |
Coin Shop
Hero Draw |
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Buff | His buff is used to boost your team’s attack (Provides the highest attack buff in-game).
Works hand-in-hand with Red Gowther to easily rank up his buff to level 3. Maximize buff effects by using him while the other team uses Green Helbram. |
Coin Shop
Hero Draw |
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Heal / Ult Charge | Provides healing and Ultimate Move Gauge boost.
Works hand-in-hand with Green Merlin to rush her Ultimate. Starts with 3 Ultimate Move Gauge orbs with Green Merlin on the team. |
Draw Hero |
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Barrier / Ult Charge | Provides a barrier to protect the team and mitigate damage from the boss.
Adds an Ultimate Move Gauge orb for your team to provide a head start. |
Coin Shop
Hero Draw |
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Attack | A secondary attacker with a high survivability rate. His Ultimate deals substantial damage. | Draw Hero |
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Sub | Best hero for the sub-slot, increasing all allies' Attack-related stats by 10% in Death Match. | Coin Shop
Draw Hero |
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Sub | Increases all allies' damage dealt by 15% in Death Match | Coin Shop
Draw Hero |
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Optional | The strategy is to stack her unique ability effects by using skills while the Gray Demon is flying. Then unleash her “Flash Attack” skill or Ultimate when the boss lands on the ground.
Only use when you have no Green King or Green Escanor in your Hero Box. |
Coin Shop
Draw Hero |
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Optional | His “Enchant: Hell Blaze” skill is a strong ranged attack. Additionally, merge and rank up “Outburst Counter” as you take damage while the boss is flying, then use the card on your 3rd turn just before the boss lands for a huge counter-attack.
Only use when you have no Green King or Green Escanor in your Hero Box. |
Draw Hero |
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Optional | Provides sustain and decent damage while the boss is flying. The boss will also receive additional damage from Shatter effects by using his Ultimate.
Cannot be used with another King present in your team. |
Chapter 3 Story
Coin Shop |
Rewards
Various rewards are given after clearing the Death Match which is necessary for Hero Limit Break, Hero Awakening, and Equipment Awakening.
Reward Rules
- Increased chance to acquire better rewards for winning while alive.
- Increases Village Friendship upon clearing a Death Match.
- Gives buff to apply discounts to all items purchased with gold in the village shop.
Death Match Victory Reward
| Normal | Hard | Extreme' | |
| Guaranteed Reward | Gray Demon’s Wing x2 | Gray Demon’s Wing x2 | Gray Demon’s Wing x2 |
| Party Leader Reward | 3* Water of Life x2 | 3/4* Water of Life x2 | 4/5* Water of Life x2 |
| 3* Demon’s Blood x2 | 3/4* Demon’s Blood x2 | 4/5* Demon’s Blood x2 | |
| Gold Box Chance | 20% | 12% | 8% |
| Silver Box Chance | 30% | 28% | 22% |
| Bronze Box Chance | 50% | 60% | 70% |
| Gold Box | 3* Awakening Stone x1 | 4* Awakening Stone x1 | 5* Awakening Stone x1 |
| 2* Awakening Stone x1/2/3 | 3* Awakening Stone x1/2/3 | 4* Awakening Stone x1/2/3 | |
| Silver Box | R Treasure Chest x1/2 | SR Treasure Chest x1/2 | SSR Treasure Chest x1/2 |
| Bronze Box | Gray Demon’s Wing x1/2 | Gray Demon’s Wing x1/2 | Gray Demon’s Wing x1/2 |