Araghur, the Flare Serpent

Araghur, the Flare Serpent is a multi-segmented boss fought post-Moon Lord and after Abaddon.

Spawn
Araghur can be summoned using the Thermal Flow Emitter in the Flame Razed Forest, Scorched Sands, or Fiery Caves at any time.

Behavior
The fight is made up of 2 phases. Both phases have different attacks:

First Phase:
 * Shoots [[File:Flarium Fireball.png]] Flarium Fireballs which inflict the Flarium Inferno debuff.
 * On Expert Mode, contact with his body inflicts Obsidian Curse, disabling the use of items.
 * When below 50% health, the second phase starts.

Second Phase:
 * All tail and body segments gain 50% damage reduction, while the head starts taking doubled damage.
 * All players are inflicted with The Serpent's Aura debuff, disabling life steal effects.
 * Increased movement speed and fireball shooting speed, and the head can shoot as well.
 * Summons a [[File:Araghur's Sigil (2).png]], which causes [[File:Serpent Fire Mist.png]] Serpent Fire Mist to fall from the sky.
 * Creates numerous [[File:Araghur's Sigil.png]] Araghur's Sigils around the player, which create [[File:Flare Strike.png]] Flare Strikes after a short delay.

In True Mode:
 * All attacks deal increased damage.
 * If the player leaves the Flame Razed Forest, the tooltip of The Serpent's Aura debuff changes to "The heat is rising" and the debuff starts counting down from 10 seconds. If they do not re-enter the biome after the 10 seconds are up, the debuff turns into The Serpent's Curse, disabling the use of healing potions, nullifying regen, and reducing damage.
 * In phase two, can occasionally roar and release a massive barrage of Flarium Fireballs.
 * Below 20% HP, starts summoning invincible [[File:Paradox Shadow.gif]] Paradox Shadows around the player, which lunge at them and slash before disappearing. The rate that they appear at increases as Araghur nears defeat.

Aftermath

 * Upon defeating Araghur for the first time, Flarium Crystals will spawn underground.
 * Winged Furia start spawning in the Fiery Caves and Scorched Sands during a sandstorm.
 * Pumpkings and Ice Queens start dropping Fragments of Blight and Fragments of Hatred respectively upon reaching the 15th wave of the Pumpkin Moon and Frost Moon.

Tips

 * In Expert Mode, try to not get hit by his segments at any cost.
 * The debuff inflicted will disable the use of Weapons, Tools and Potions, which will make you easy bait.
 * Once he reaches his second phase you need to defeat him as quickly as possible, as the amount of projectiles will increase which makes the fight even harder.

Trivia

 * Araghur's theme is The Dark Guardian of Flames, which is composed by Lordcakespy.
 * Previously, this boss was simply named "Flare Serpent" until it was suggested to be changed to Araghur, the Flare Serpent.