Digivolve: 1 from [DoruGreymon][When Digivolving] You may trash 1 card with [Dex] or [DeathX] in its name or [X Antibody] in its traits in your hand to gain 1 memory. [When Digivolving] If this Digimon has [DoruGreymon] in its digivolution cards or is digivolving from the trash, delete 1 of your opponent s level 4 or lower Digimon.