Great Demonic Black Dragon, Arch Enemy (D-BT02/0037EN) (D-BT02)

[Call Cost] [Pay 2 gauge & Put a "Black Dragon" from your drop zone into this card's soul]
When this card attacks, deal 1 damage to your opponent! If there are ten or more cards in your opponent's drop zone, deal 2 damage to your opponent instead! If there are twenty or more, deal 4 damage to your opponent instead!
[Soulguard]