Akino, Bound for Tomorrow (WXDi-P04-007) [Vertex Diva]

[Auto]: At the beginning of your main phase, you may put a white SIGNI on your field into their owner's trash and pay (W). If you do, return target SIGNI on your opponent's field to its owner's hand.
[Enter]: Draw a card and [Ener Charge 1]
[Action] [Game 1] (W0): During the main phase and attack phase of your opponent's next turn, SIGNI on your field gain [Shadow]. (Affects SIGNI that enter the field after this ability has been activated.)