DexDorugamon (BT17-065) - Secret Crisis

[[Digivolve] [Dorugamon]: Cost 0]
[Trash] [All Turns] When one of your [Dorugamon] would be deleted, by digivolving it into this card without paying the cost, prevent that deletion.
[When Digivolving] Trash 1 card in your hand. Then, [Draw 1]. If [Dorugamon] is in this Digimon's digivolution cards or this digivolved from the trash, delete 1 of your opponent's Digimon with a play cost of 4 or less instead.

[Reboot] (This Digimon also unsuspends during your opponent's unsuspend phase.)