This allows you take more lantern rings of different colors than the base one you have selected previously.
Project V17/Powers/Shardless/Object of Power Upgrades/Additional Lantern Rings (DC Comics)
From Worm CYOA Wiki
Additional Lantern Rings (DC Comics)
Cost: 15 SP (Central Power Battery (DC Comics))
Cost: 10 SP (Central Power Battery (DC Comics))
Required: Lantern Ring (DC Comics)