Herald of Vitu-Ghazi

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.)
Flying, hexproof
Creature tokens you control get +1/+1.
"Vitu-Ghazi is not gone. She merely slumbers. Soon
she will awaken, and spread her branches across
Ravnica yet again."