QueenBeemon

[On Play] [When Digivolving] [When Attacking] [Once Per Turn] You may place 1 [Royal Base] trait card from your hand or trash face up as the top or bottom security card. Then, delete up to 8 play cost's total worth of your opponent's Digimon. For each of your face-up security cards, add 2 to this effect's play cost maximum. [When Digivolving] [When Attacking] [Once Per Turn] You may play 1 card with [Royal Base] in its text from your hand. For each of your face-up security cards, reduce this effect's paid play cost by 1.

Alternate effect

[Digivolve] Lv.5 w/[Royal Base] trait: Cost 3