Ancient Brass Dragon

Mana Cost: {5}{B}{B}
Total Cost: 7
Type: Creature — Elder Dragon
Description: Flying
Whenever this creature deals combat damage to a player, roll a d20. When you do, put any number of target creature cards with total mana value X or less from graveyards onto the battlefield under your control, where X is the result.
Power: 7
Toughness: 6
Colors: B