Ryu Sen

Qin / Hishin Unit

[During Opponent's Turn] If you have four or more [Hishin Unit] affinity cards with unique names on your field, this character gains [Nullify Impact] (The character battling this character loses [Impact] for the duration of this battle) and This character cannot be moved, returned to your hand, or affected by BP-reducing abilities.

[Active] Choose one character on your field and switch it to active. It gains 3000 BP until the end of the turn.