Ancient Brass Dragon (PCLB 111s)

Creature — Elder Dragon • Mana cost: {5}{B}{B} • Battle for Baldur's Gate Promos • Mythic

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.

Illustrated by Johan Grenier.