[When Attacking] You may play 1 Digimon card with
[Sistermon] in its name from your hand or trash
without paying its memory cost. [Your Turn][Once Per
Turn] When you play another Digimon, this Digimon
gets +3000 DP and <Piercing> for the turn. (When
this Digimon attacks and deletes an opponent's
Digimon and survives the battle, it performs any
security checks it normally would.)