If you are looking for "helpful papers" or guides on the most powerful slugs in the series or games like Slugterra: Slug it Out 2 , Uni is often grouped with other legendary or ultra-rare types: Rarity/Role Primary Ability Legendary/Creator Sonic waves and power mimicry Elemental Slugs Pillars of Slugterra Govern fire, water, earth, air, and energy Enigmo Ultra-rare/Legendary Distorts vision and allows slingers to see slug auras Boon Doc Rare Guardian Known for powerful healing and purifying ghouls The Universal Slug | SlugTerra Wiki | Fandom