Giacobinids, Natural Planet (WXDi-D05-017) [Diva Debut Deck D05: Bang Tamago Nova]

[Auto]: At the beginning of your attack phase, if the SIGNI in front of this SIGNI is frozen, you may pay (U)(U)(C). If you do, this SIGNI gains [Assassin] until end of turn.
(A SIGNI with [Assassin] deals damage to your opponent directly rather than battling with the SIGNI in front of it when attacking.)