Gensokyo/Utsuho Reiuji

Utsuho Reiuji is a Tier 7 Hardmode, post-Lunatic Cultist boss, and is currently the final boss of the Gensokyo mod.

Spawn
Utsuho can be summmoned at the Subterranean Sun using the Charged Solar Fragment.

If the the world was not generated with the Gensokyo mod enabled, she can be summoned anywhere in the Underworld instead.

Behavior
Utsuho alternates between a movement phase and a stationary phase. In her stationary phase, she attacks using one of seven different spellcards, depending on her remaining hitpoints.
 * Sun Sign "Solar Eruption": Utsuho shoots solar orbs in all directions, randomly using one of three different patterns.
 * Atomic Fire "Uncontainable Nuclear Reaction": Utsuho shoots massive Red Giants in all directions, while also shooting smaller projectiles in a spiralling pattern.
 * Explosion Sign "Peta Flare": Once again, Utsuho shoots Red Giants, but this time aimed at the targeted player. The Red Giants in turn emit smaller projectiles in all directions.
 * Atomic Fire "Nuclear Dive": Utsuho charges towards a player, leaving a trail of solar orbs, and also emitting them orthogonal to her charge direction.
 * Blazing Star "Ten Evil Stars": Utsuho summons ten Red Giants which rotate around her. Five rotate close to her, while the other five rotate around Utsuho at a larger distance. After a short time, they begin emitting smaller projectiles.
 * "Hell's Tokamak": Utsuho shoots two (or occasionally three) stars. Once they have reached a certain distance from Utsuho, they begin rotating around her, leaving a trail of smaller projectiles in their wake. After some time, these smaller projectiles begin accelerating outwards.
 * "Subterranean Sun": Many bullets appear all around Utsuho, which soon begin spiralling in towards her. A massive star begins growing around Utsuho and occasionally emits smaller projectiles in all directions.

Trivia

 * While Utsuho is alive, a remix of 'Solar Sect of Mystic Wisdom ~ Nuclear Fusion', Utsuho's theme from Subterranean Animism, will play.