Sunlight Javelin

The Sunlight Javelin is a gun that shoots fiery javelins. If a javelin hits an enemy, they will receive a yellow glowing effect and will take damage over time for a short period of time.

While in inventory, all guns will appear brighter, including the javelin.

Trivia

 * This gun is a reference to the Sunlight Spear, a miracle in the Dark Souls series whereby the caster hurls a bolt of lightning, though the Dark Souls version does not deal damage over time.
 * "Grossly incandescent" and "brilliant aura" is reference to Solaire, an NPC from Dark Souls who says this quote ("If only I could be so grossly incandescent", "Spot my summon signature easily by its brilliant aura" ).
 * Solaire introduces the player to co-op in Dark Souls, which is referenced by both the description text and the unlock methods both being forms of cooperation.
 * Both the Gun Soul and Old Knight's Flask, the items which complete the \o/ synergy, are also references to Dark Souls.
 * The "\o/" synergy name is a reference to the "praise the sun" gesture in Dark Souls.
 * It's also very similar to the Daybreak, a high tier spear in Terraria with a sunlight theme that deals damage over time.
 * This gun functions similarly to the Valkyrie, a javelin from Destiny 2.
 * Prior to patch v2.1.5 the game would not set the necessary flag to unlock this gun, therefore making it impossible to unlock without the use of a save editor or mod.
 * This weapon can also be used to damage bosses when disappeared, such as Cannonbalrog or the High Priest.
 * The Ammoconda must be hit in the head to apply the glowing effect.