The Solar Eruption is a Hardmodeautoswingingmelee weapon which fires a long, spear-like projection from the player's position that quickly retracts. The tip follows a narrow arc in the general direction of the cursor before retracting. The Solar Eruption can travel through blocks and inflicts the Daybrokendebuff upon hitting an enemy, which deals ticks of 25 damage per quarter-second for 5 seconds.
Its best modifier is Godly or Demonic. Both modifiers increase the average damage output by the same amount.
The Solar Eruption was likely inspired by Solar prominences, where large, twisting, looping, and arcing plasma emissions are ejected from the surface of the Sun into space.
The Solar Eruption is regarded as one of the best overall weapons in the game due to its high damage, debuff, and its block-ignoring effect.
The Solar Eruption during its attack animation is referred to as "Solar Whip Sword" internally, implying that this weapon may have been meant as the sword-type item for the set of equipment crafted from Lunar Fragments.
Only the first target pierced by the Solar Eruption has an explosion animated on them even though all targets will explode.
The Daybroken debuff that the Solar Eruption and the Daybreak inflict does not have its own debuff symbol as it currently cannot be inflicted on players. It uses the Stardust Dragon buff icon as an internal placeholder.
The shaft of the weapon has a total of 18 pairs of spikes.
The projectile ID name in the game refers to the Solar Eruption as "SolarWhipSword".