Card Errata:YZ-Tank Dragon

"Y-Dragon Head" + "Z-Metal Tank" This card can only be Special Summoned from your Fusion Deck by removing from play the above cards on your side of the field. (You do not use "Polymerization"). This card cannot be Special Summoned from the Graveyard. Discard 1 card from your hand to destroy 1 face-down Monster Card on your opponent's side of the field.