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Demon Night and Thorny Grave

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Demon Night being cast in Dark Dawn

Demon Night (ひゃっきやこう, Demons' Nightly March) and Thorny Grave (おどろおくり, Thorny Grave) are a pair of offensive Venus Psynergies featured in the Golden Sun series that are functionally identical but have different levels of power. Demon Night was introduced in Golden Sun, while Thorny Grave was introduced in Golden Sun: The Lost Age.

Basic Description[edit]

Demon Night and Thorny Grave are ranged Psynergies. The final amount of damage is determined by comparing the user's Venus Power to the target's Venus Resistance and using the difference to modify the base power of the particular Psynergy in use.

Demon Night
Demon Night.gif Demon Night DD.gif
Star venus.gif Venus 12 PP
Range 3.gif
''Unleash a myriad of monsters." (GS-TLA)
"Strike with a myriad of monsters" (DD-present)
Attacks up to three targets with a base power of 60. May inflict haunt on a foe.
Thorny Grave

Thorny Grave.gif ThornyGraveDD.gif

Star venus.gif Venus 24 PP
Range 3.gif
"Summon a loathsome fiend" (TLA)
"Summon a legion of loathsome fiends."(DD-present)
Attacks up to three targets with a base power of 170. May inflict haunt on a foe.

Thorny Grave being cast in Dark Dawn

In Golden Sun and The Lost Age, Demon Night features a group of purple colored spirits attacking the enemy. The spirits are small in size, but relatively numerous. In Dark Dawn, the caster will plunge their weapon into the ground. Meanwhile, the surrounding area will grow dark with a blue mist lingering about. Multiple blue spirits will emerge from the ground to attack the foe.

Thorny Night retains the general visual characteristics, but with a few key differences. In The Lost Age, the summoned spirits are larger in size, and are colored a dual purple/black. Dark Dawn's version is extremely similar to Demon Night, but features larger and more numerous spirits.

Damage Calculation[edit]

Elemental Power attacks such as the Demon Night series use a set base power as the base damage to be modified. For example, the base power of Thorny Grave is 170. Thus an unmodified Thorny Grave would deal around 170 points of damage.

Thorny Grave's attack takes this base damage value and uses it in the following equation:

final damage = (base damage) * (1 + (User's Venus Power - Enemy's Venus Resistance) / 200)

To word this in prose, The Demon Night series takes the base damage of the particular attack, and then modifies this by how much higher or lower the user's Venus Power is than the target's Venus Resistance. The difference between the user's Venus Power and the target's Venus Resistance is then divided by 200, then 1 is added to this, resulting in what can be called the "elemental damage multiplier". This number is what the Psynergies' damage is multiplied by.

Demon Night being cast in the GBA games.

For example, if an Adept with a Venus Power of 150 casts Thorny Grave on a monster with a Venus Resistance of 50:

  • damage = (base damage) * (1 + (Power - Resistance) / 200)
  • damage = (170) * (1 + (150 - 50) / 200)
  • damage = (170) * (1 + 100 / 200)
  • damage = (170) * (1 + 0.5)
  • damage = 170 * 1.50
  • damage = 255

Therefore, a Thorny Grave cast under these circumstances would deal approximately 255 points of damage to the targeted enemy. In addition, other enemies in range of the attack would take a percentage of the original damage, with the percentage decreasing as distance from the main target increases.


Thorny Grave being cast in The Lost Age.

Demon Night and Thorny Grave are unique to the Samurai class series, meaning that only Venus and Mars Adepts have access to the series. The exception to the rule is the Venus Adept Himi, who cannot access the class. Similarly to the Ragnarok series, Thorny Grave is a replacement for Demon Night as higher classes are reached. Demon Night is available to the Samurai stage, while Thorny Grave is available to the Ronin stage of the class. Both Psynergies can be learned at Level 18, with only the Adept's class determining which Psynergy is learned.


General: While useful in theory, the Demon Night series is often overlooked in favor of the other numerous Psynergies available to the series.

Golden Sun: Demon Night will be weaker than Rockfall, which will generally be available to the typical endgame party. Generally, the Samurai will be used more for its overall sturdiness and array of buffing Psynergies, thus, Demon Night will see little use.

Golden Sun: The Lost Age and Golden Sun: Dark Dawn:While Demon Night's usage will be similar to its previous appearance, Thorny Grave is a viable, if overlooked option. Thorny Grave has the distinction of being the strongest multi-target Psynergy available. However, it will pale in comparison to the raw power of Epicenter, and the strength and reliability of Quick Strike.

Venus Psynergy in Golden Sun and The Lost Age
Elemental Base Damage Bramble CardDemon Night / Thorny GraveGaia seriesGrowth seriesPunji seriesQuake seriesRockfall seriesSpire seriesThorn series
Elemental Phys. Attack AnnihilationCall DemonDinoxGrand GolemHelm Splitter / Skull SplitterLiving ArmorMinotaurusRagnarok / OdysseySabre DanceTroll
Support CondemnCure seriesCurseDeath CardFire PuppetHauntLichRevive
Utility CarryCatchGrindGrowthRetreatSandScoopTremor
Venus Psynergy in Dark Dawn
Elemental Base Damage Demon Night / Thorny GraveGaia seriesGrowth seriesPunji seriesQuake seriesRoaring Dragon seriesRockfall seriesSpire seriesThorn seriesToxic GritUndead Curse series
Elemental Phys. Attack AnnihilationHelm Splitter / Skull SplitterRagnarok / OdysseyPsynergy SlamPsynergy Surge
Support CondemnCure seriesCurseFear PuppetHauntReviveWeapon Grace
Utility GripGrowthMoveRetreatSearch