If you have four or more yellow characters without [Rumbling] affinity whose card names are unique on your field, reduce this card's AP cost by 1 while in your hand. Choose one character with {5000 or less BP} on your opponent's front line and sideline it. If "Mikasa Ackermann" is on your field, {8000 or less BP} instead.
Trigger
[Special] Choose one character on your opponent's front line and sideline it.