X unit

An X unit (ユニット Ekusu Yunitto) is a type of unit. Unlike s and s, but like s and absolute units, X units are put into the G deck during deck construction. Players may only put up to 4 X units into their G deck during deck construction. X units can be identified by their black borders with yellow lines.

X units are played onto the field via Extend, which creates an extraguard circle to place them on and then places them onto the circle. X units cannot normally be or ed.

Whenever an X unit leaves the field or moves between non-circle zones, it is returned to the G zone face up.