LEGO 40912 Sea Serpent is an upcoming Ideas set with an expected retail price of $24.99, expected to release on July 7, 2026. Pre-order prices on the secondary market are currently around $58.
LEGO 40912 Sea Serpent is a 241 piece Ideas set with 2 minifigs pending release in 2026. The GWP is a modern remake of LEGO 6057 Sea Serpent, a Castle set released in 1992. The model recreates a Black Knights ship with a black hull, blue railings, brown deck details, a front-mounted cannon, oars, shields, and a large fabric sail printed with a red sea serpent emblem. It includes two Black Knights minifigures with helmets, weapons, and shields. The set was based on the winning entry from the LEGO Ideas A Twist of Nostalgia challenge.
Retirement risk. Sea Serpent is expected to retire on or around July 14, 2026.