MetalGreymon

[On Play] This Digimon gains ＜Rush＞ for the turn. (This Digimon can attack the turn it comes into play.) Then, if DigiXrosing, trash up to 2 digivolution cards of 1 of your opponent's Digimon. 
 ＜Material Save 2＞ (When this Digimon would be deleted, you may place 2 cards in this Digimon's DigiXros requirements from this Digimon's digivolution cards under 1 of your Tamers.)

[When Attacking] If this Digimon is [GreyKnightsmon], 1 of your opponent's Digimon with 3 or fewer digivolution cards can't attack until the end of your opponent's turn.

[Alt]
DigiXros Requirements [DigiXros -2] Blue [Greymon] x [MailBirdramon]
When this would be played, you may place specified cards from your hand/battle area under it. Each one reduces the play cost.