While you don't have [Knight Device] in the battle area, you may ignore this card's color requirements. When this card is trashed from the battle area, 1 of your Digimon gains [Piercing] and gets +4000 DP for the turn.
[Main] 1 of your Digimon gains [Piercing] and gets +4000 DP for the turn. Then, place this card in the battle area.