Mutalisk Swarm

Squad {2}+1
When Mutalisk attacks and deals damage it may deal 1 damage to any other defending creature/player. When Mutalisk defends and deals damage it may deal 1 damage to any other attacking creature.
"Mutas are born to frenzy. Frenzy for food, frenzy to spread. Frenzy for blood. A Mutalisk can smell a single drop of blood on the wind two klicks away."
—Breg Shaw, Mutalisk hunter