Premium Bandai reveals a transformation item for Kamen Rider Zi-O.
DX Grease RideWatch is a transformation item themed after Kamen Rider Build‘s third Rider, Kamen Rider Grease. It can be used in the secondary slot of the DX Ziku-Driver to play the Grease Armor transformation:
“Armor Time: Robot Jelly! Grease!”
This product is available for pre-order for ¥1,620 and is expected to ship on September 13th, 2018.
Source: Premium Bandai