Abbadomon

[On Play] [When Digivolving] If there are 4 or more total [Negamon] in your trash and your Digimon's digivolution cards, you may play 1 [Abbadomon Core] from your hand or trash to your empty breeding area without paying the cost.
[End of All Turns] [Once Per Turn] By placing 1 level 6 or 16 or lower Digimon card with [Negamon] in its text from your trash as this Digimon's top digivolution card, delete 1 of your opponent's Digimon with the same level as the placed card.
[Assembly -6] 4 [Negamon]
When this would be played, by placing the specified cards from the trash under it, reduce the play cost.