Nebula Arcanum

Swirling vortex detonation and homing secondary sparks

Nebula Arcanum is crafted at an Ancient Manipulator using eighteen Nebula Fragments. When cast, it conjures a slow-drifting orb of swirling cosmic energy that gently tracks nearby enemies. As the orb floats, it emits minor sparks that damage nearby foes. Upon colliding with an enemy three times, striking solid terrain, or expiring after several seconds, the sphere detonates violently, scattering three high-speed homing energy darts. The main projectile deals 70 base magic damage with 5 knockback, costing 30 mana per cast.

Crowd control utility and Nebula weapon rivalry

Nebula Arcanum stands alongside Nebula Blaze as one of the two pre-Moon Lord magic weapons crafted from pillar materials. While Nebula Blaze specializes in rapid single-target dueling, Nebula Arcanum excels at area crowd control, obliterating clustered enemies during the Solar and Vortex pillar invasions. Its lingering explosions also help hit large bosses with multiple hitboxes. The Mythical modifier provides the best all-around upgrade, lowering mana consumption while increasing velocity, damage, and critical chance.

Trivia

• The primary vortex projectile can strike up to three times before undergoing its final explosive burst.
• The three secondary homing projectiles chase nearby targets aggressively after the main orb detonates.