70638 Katana V11 is a set that came out in 2018.
Official LEGO.com Description
Play out a high-speed chase on water and land with this action-packed LEGO® NINJAGO® set, featuring Kai’s Katana V11 boat, with speed and attack modes, foldout boosters and spring-loaded shooters. This cool toy for kids also includes Luke Cunningham's street bike, plus 2 minifigures with weapons to boost the role-play battle action.
- Includes 2 minifigures: Kai and Luke Cunningham.
- Katana V11 features speed and attack modes, an opening minifigure cockpit, foldout boosters, 2 hidden spring-loaded shooters, opening storage compartment, gold-colored ninja blades, and translucent flame-style exhaust elements.
- Fold out the boosters for attack mode and unleash the hidden spring-loaded shooters.
- Street bike features a minifigure seat and a translucent flame-style exhaust element.
- Weapons include Kai's 2 katanas and Luke Cunningham’s katana.
- Recreate and role-play epic scenes from the NINJAGO® Masters of Spinjitzu TV show.
- This cool toy for kids is suitable for ages 7-14.
- Katana V11 measures over 1” (5cm) high, 7” (20cm) long and 3” (8cm) wide in speed mode, and over 5” (13cm) wide in attack mode.
- Street bike measures over 1” (5cm) high, 2” (6cm) long and under 1” (2cm) wide.
- Kai's Season 8 form is exclusive to this set; as of now this is the only Sons of Garmadon set he appears in.
- This is the only Season 8 set to not feature an Oni Mask, the collectible item for the season.
- This is Kai's sixth vehicle, making him the ninja to have the most vehicles out of any Ninja to date. His first is his Blade Cycle, the second being the Fire Mech, his third being the Kai Fighter, the fourth being the X-1 Ninja Charger, his fifth being his other bike, and the seventh being the Destiny's Wing.
- This set was first seen in Episode 82 - Dread on Arrival.