Shrine of Caliginosity [NOVA]

No reported gimmicks. Use them to build arts.

Has very high DMG RES, reduced each time he is broken; a breaker such as Chloe (Fate) makes this wave much faster. At 50% HP he is invulnerable while casting his second arts and permanently gains DMG UP. That arts also reduces your DMG RES for 10s.

Demon Killer: Demon units take heavy damage. Both of her arts remove barriers. A Demon tank such as Thetis needs strong DMG RES buffs. At 50% HP she is invulnerable while casting her second arts and permanently gains DMG UP.

Periodically targets your highest-HP unit: 6s Faint, a 10s damage-over-time that leaves it at 1 HP, and its arts gauge and skill CT reset to 0. A healer gets that unit back up. Her normal attacks apply a stackable DMG RES DOWN lasting over a minute. At 50% HP she gains permanent 200% CRI RES UP and her arts becomes Endless: typeless (neither PHY nor MAG), lasts 12s, and gives her a permanent stack of DEF UP. Teamwide Ignore DEF (Miyu) keeps your damage up. At 0% HP she casts Apocalypse (MAG) before dying; with stacked DMG RES DOWN this can wipe the team, so have mitigation ready.