Fever

Fever (コロナ Corona) is a Mars Djinni found throughout the Golden Sun  series.

Fever is the second Mars Djinni in both the original Golden Sun and  Golden Sun: Dark Dawn. Fever is also acquired in Golden Sun:  The Lost Age, and although it is not  the party's second Mars Djinni, Fever is still ordered as the second Mars Djinni when equipped to  characters. Because it is not available until after most other Mars Djinn can be found, however, the  separate Djinn list viewable with the Select button from the status  screen lists Fever and all other Mars Djinn from Golden Sun after  all of the Djinn introduced in The  Lost Age. According to this order, Fever is the thirteenth Mars Djinni  in The Lost Age rather than  the second, but this order has no influence elsewhere in the game.

Basic description
When Set, Fever increases its Adept's base HP by 8, base Attack by 3, and base Agility by 2.

When Fever is unleashed in battle, the user deals a Mars-based attack equal in power to the user's normal physical attack with an additional 30 damage points added to the  result. Then there is a chance the target will be afflicted with the Delusion status condition.

In Golden Sun and The Lost Age, Fever's unleash  animation visually resembles the user performing a fairy typical strong  Mars attack, and then an orange cloud is let loose upon impact. In Dark Dawn, the user still leaps through the air, but a 3D model of Fever hovers behind them and, when the user strikes the target, their weapon and the  area of ground underneath and behind the target is cloaked in fire.

Damage calculation
Elemental physical attacks such as Fever use the damage dealt by the attacker's standard physical attack as the  base damage to be later  modified. The total amount of damage dealt by a normal physical attack  is half the difference between the attacker's  Attack statistic and the target's Defense  statistic,  as this equation shows:


 * ''base damage = (Attacker's Attack - Target's Defense) / 2

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


 * ''final damage = (base damage + 30) * (1 + (Attacker's Mars Power - Target's Mars Resistance) / 400)

To word this in prose, Fever takes the base damage of the user's normal   physical attack, adds 30 to it, and then this result is modified  by how  much higher or lower the user's Mars Power is than the target's  Mars  Resistance. The difference between the user's Mars Power and the   target's Mars Resistance is divided by 400, then 1 is added to this,   resulting in what can be called the "elemental damage multiplier". This  number is what Fever's damage is multiplied by.

For  example, if an Adept with an Attack rating of 100 and a Mars Power   of 120 unleashes Fever on a monster with a defense of 20 and a Mars   Resistance of 70:


 * damage = ((Attack - Defense) / 2 + 30) * (1 + (Power - Resistance) / 400)
 * damage = ((100 - 20) / 2 + 30) * (1 + (120 - 70) / 400)
 * damage   = ( / 2 + 30) * (1 +  / 400
 * damage   = ( + 30) * (1 + )
 * damage =  *
 * damage = 78

Therefore,  if Fever were to be unleashed under these circumstances it would deal     78 points of damage.

Locations
Golden  Sun: Fever reposes in Imil Falls Cave, the tiny cavern at the town of  Imil, reachable by sliding around through the frozen river and into  the hole of the frozen waterfall. To reach there, first you have to stand in front of the snowman at the north end of the town and cast  Move to shift it left and drop it onto the frozen ice river below. Then entering the river via the opening just to the right of the sanctum in the southwest part of town, slide right, up, left, up, left, up,  right, up, left, up, right, and up to enter the opening. You automatically slide into Fever, and press A to immediately add it to  your collection.

Golden  Sun: The Lost Age:  Players can transfer data from Golden   Sun to The Lost Age, but  even if they don't, Fever will be among   the Djinn Isaac's party has  with them when they join forces with   Felix's party late in the game.

Golden Sun:   Dark Dawn: Fever is the first Djinni that can be encountered by random battle while  exploring a specific part of the game's overworld. In this case, it is the stretch of land that the player travels south through while  traveling from Carver's Camp to desert lands surrounding Konpa  Ruins. It seems programmed so that it is impossible not to get into a random battle with Fever. When the Djinni is defeated in battle, it is added to your inventory.

Analysis
General: As the "basic" offensive Mars Djinni, Fever is best used as soon as it can be acquired in each game it appears in because its 30 set damage bonus is quite substantial if the equipped Adept's physical attack only does roughly 30 damage on its own. However, at the end of each game, it is entirely obsolete in comparison to other Mars Djinn because 30 set bonus damage is all that can be gotten out of it.

By game
Golden Sun: Fever is the weakest of the three available offensive Mars Djinn from an  endgame perspective; like Torch, it only adds 30 damage points, but  unlike Torch, the added status effect of Fever, the Delusion status  condition, is considered to be rarely helpful to have inflicted on  enemies because Delusion's associated accuracy drop does not apply to  anything that is not a normal physical attack. Fever is quite useful to make use of early on in the game when it is first acquired, though, for  at that point 30 additional damage is quite substantial. Fever is a Djinni whose effect becomes less valuable over time when your focus is  using only stronger Djinn to conduct and win battles with, such as the  stronger Scorch. Another strong Djinni, Smog, doubles the damage added and retains the delusion effect.

Golden   Sun: The Lost Age: When Isaac's party joins Felix's party along with their returning Djinn,  Fever becomes all the more obsolete as a method of attack you would use  if you want to make battles won easily, similarly to the Mercury Djinni  Fog that is found earlier in that game and has the same extra  damage, particularly because another Mars Djinni exists whose battle  effect is an interesting upgrade on Fever; Shine, found in Contigo  as soon as the party joins, which adds 60 damage and has a chance to  inflict Delusion on all enemies (making it an upgrade to even Smog),  including the ones not specifically targeted by the user of Shine. Whether even that Djinni is used in battle is another story, but it certainly obsoletes Fever on its own.

Golden   Sun: Dark Dawn: Fever is the weakest offensive Mars Djinni because it has the lowest  added damage bonus (30) and the chance to inflict a status effect that  isn't the most useful. For the period of time while this remains your only attacking Mars Djinni, though, this is still quite useful because  30 additional damage points is quite substantial. However, if you have this and Forge, you are probably better off having the two of them  Set onto one Adept so that they will be in the next stage up in their  class series, giving them much more in all of their statistics. In the boss fight against the Stealthy Scouts, you may decide to have the  Adept with the two Set Mars Djinn use Forge to boost the party's  attack power first, then use Fever to deal an enhanced attack, and  finally summon Kirin with the two On Standby Mars Djinn. It will be outclassed by the far superior Lava once that is obtained in  Kaocho after the segment of the game in Ayuthay.

Name Origin
A fever is a symptom where the body's internal temperature rises above normal. A corona is the high-altitude gaseous envelope of the sun that we can see during a solar eclipse as the golden ring around the blocked out sun. Note that the English translation of the games switched the names of Fever and Corona.

Trivia

 * Prior to Dark Dawn, all Djinn of the same element shared the same design. Djinn were later given individualized appearances, but Fever retains the original Mars Djinni design as its own appearance.