Bloodline Bidding (ECL 395)

Sorcery • Mana cost: {6}{B}{B} • Lorwyn Eclipsed • Mythic

Convoke (Your creatures can help cast this spell. Each creature you tap while casting this spell pays for {1} or one mana of that creature's color.)
Choose a creature type. Return all creature cards of the chosen type from your graveyard to the battlefield.

Illustrated by morizo.