digimon card game greymon BT2-065 War (SR Super Rare) Booster Ultimate Power (BT-02) : Toys & Games Rare secret card featuring Greymon from the Digimon+Trading Card Game set Secret Crisis (BT17 digimon card game greymon Championship

It's a special promo card that was given away by Kids WB in a tie-in with the Yugioh anime

In combination with the Field Spell Zombie World (a card that turns every Monster on the field into a Zombie type), this effect can help you get rid of nearly any Monster

VRAINS (!)

You can only use each of the following effects of "Armed Dragon Thunder LV5" once per turn

Card Name: Armadeddon Knight Card Type: Effect Monster Card Number: THSF-EN035 Set: The Secret Forces Attribute: Dark Level: 4 Monster Type: Warrior Passcode: 28985331 Card Text: When this card is Summoned, you can send 1 DARK monster from your Deck to the Graveyard