Astamon (BT13-084) - Versus Royal Knights

[On Play] [When Digivolving] By deleting 1 of your other purple Digimon, this Digimon may digivolve into a Digimon card with [Belphemon] in its name in your hand without paying the cost.

[Opponent's Turn] [Once Per Turn] When a card is trashed from your hand, you may play 1 level 4 or lower purple Digimon card from your trash without paying the cost.