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Down by the old warf, the characters are traveling through the lower district of Zobeck when they hear a cry for help. Investigating, they come to an old ramshackle dock. Out on the water is a huge half-submerged steam vessel called the Western Dawn which sunk a decade ago. The cries lead them to meet Brik - Kobold in Trouble.

Doppelrat (ToB pg 123)

Ratfolk (ToB pg 320)

Rat Swarm

Comfy slippers; wondrous item, common; Vault of Magic, page 127

Glyphed feyish wand that casts wind lash.  Level 0, 1 action, 20 feet, Instantaneous. Your swift gesture creates a solid lash of howling wind. Make a melee spell attack against the target. On a hit, the target takes 1d8 slashing damage from the shearing winds and is pushed 5 feet away from you.

Freezing natural jewelry box that casts guiding star.
Level 1, 10 minutes, Self, 8 hours. By observing the stars or the position of the sun, you are able to determine the cardinal directions, and the direction and distance to a stated destination. You can’t become directionally disoriented or lose track of the destination. The spell doesn’t, however, reveal the best route to your destination or warn you about deep gorges, flooded rivers, or other impassable or treacherous terrain ahead.