Toji’s Worm

Toji has a weird worm that can store many different objects within its body
Toji can freely interchange his weapons by putting them in and taking them out of the creature's mouth
The Worm can shrink itself within its own body, allowing Toji to ingest it so people can't detect the Mana it emits
The inventory curse contains Toji's entire wide arsenal, including his cursed tools and even a swarm of (Fly Heads) Toji can use as a chaff grenade