Vyaggo, Chief Infector

+1: Put a 1/1 Green and Black Elf Warrior creature token with Infect onto the battlefield.
-1: Put a 0/1 Green Elf Shaman creature token with Infect onto the battlefield with "Tap a creature with Infect and draw 2 cards".
-7: Sacrifice three Elves. Put a Dragon token with Flying and Infect onto the Battlefield.