If I could revamp OCRAM, the old console and mobile boss, as part of vanilla Terraria, this is what I would do. (HE FOLLOWS THE CURSOR!) (Phase 2 coming in another project) Attacks: Spectral beams as main attack (replace lasers) Cursed Scythe waves (replace phase 2's demon scythes) Occasional Spectral Fire spiral (bullet-hell type thing) Summon Servants of Ocram Lore: Ocram, once a powerful beast hailing from the underworld, has since had its mind corrupted by the crimson/corruption.
Terraria by RE-LOGIC! PLANS: more attacks probably servants of ocram crimson recolor (would be switchable)
