Elastic Band Curse – Perfect frontline defender against sudden explosions, gunfire, or devil blasts. In a world full of projectile-based devil abilities (Gun Devil fragments, Missile Devil, etc.), this makes Geto's army tanky.
Manta Ray Curse (Mobility) – In a city-scale battlefield, it gives him freedom of movement. Combine with airborne devils he absorbs, and suddenly Geto has both naval and aerial dominance.
Barrier-type Curse (Space/Time Overlap) – This is huge. If it overlaps space, that means Geto could contest devil contracts or devil domains. This curse essentially makes him capable of nullifying or resisting devil "territory-based" abilities.
Surveillance Curses (Multi-eyes) – These become his spy network. In the Chainsaw Man world, fear and misinformation are power. Imagine Geto blanketing an entire city with living cameras to track devil activity, devil hunters, or human resistance.
Squid/Cuttlefish Curses – In a devil-heavy battlefield, squids spamming attacks at high speed would function as suppressive fire. Great fodder, but in swarms, they'd overwhelm weaker devils or hunters.
Rainbow Dragon Curse – Flight and raw durability. If Geto absorbs devils with aerial affinity (like the Bat Devil), his aerial corps becomes terrifying.
Kuchisake-Onna (Imaginary Vengeful Spirit) – Deploying a Simple Domain in the Chainsaw Man world is interesting, because devils don't really have that mechanic. It could force devils into human-like logic games, basically flipping fear-creatures into something they hate: restrictions.
Cyclops Curse – City-level destructive power, perfect for intimidation or clearing devil hordes.
Inventory Curse – Arguably broken. In Chainsaw Man, weapons are everything (devil contracts, weapon devils, hybrids). The ability to store anything gives Geto both an armory and a transport system.
Forest Fire Curse – Imagine unleashing this in Tokyo against a devil swarm. That's area-denial and terror on a massive scale.
Semi-Grade 1 (Beam Firing Curse) – Long-range artillery. Pairs well with Gun Devil fragments Geto might later consume.
Massive Bird Curse – If this thing carried his entire cult/family in JJK, in Chainsaw Man it could serve as his "moving fortress." Picture Geto commanding legions of curses and devils from above the skyline.
Tapeworm/Leech Horde – Perfect biological swarm. In Chainsaw Man, where some devils are weak to overwhelming numbers, this would devastate mid-level threats.
Tamamo-No-Mae (Imaginary Vengeful Special Grade) – The crown jewel of his army. In Chainsaw Man, where Special Grade-level curses = Primal Fear-level devils, Tamamo would be his equalizer against stronger devils like Darkness, Eternity, or future Primal ones.
Building-sized Katana Wielding Curse – Great for breaking contracts and physical devil forms. Against hybrids, it would function as a counter to regeneration through sheer size and cleaving power.