Arcturusmon

[When Digivolving] You may place 1 Digimon card with [Gammamon] in its text from your trash as this Digimon's bottom digivolution card. Then, you may delete 1 Digimon whose level is less than or equal to the number of cards in this Digimon's digivolution cards.
[On Deletion] You may return 1 Digimon Card from your trash to your hand. Then, by trashing 1 [Siriusmon] from your hand, you may play 1 [Proximamon] from your hand without paying its cost.

[Your Turn] [Once Per Turn] When an opponent's Digimon is deleted, if this Digimon has [Gammamon] in its text, trash the top card of your opponent's security stack.

[Alt]
[Digivolve] Lv.5 w/[Gammamon] in text: Cost 4