Burster Mob

The Burster Mob is somewhat of an Anti Creeper. The Burster would follow the player around and explode. But instead of producing an explosion it burst into a large growth and attempts to suffocate the player. So instead of destroying blocks it would create them. The Burster would look similar to a creeper except blue and probably having a different face. A Burster is usually more timid during the night (not passive, but less aggressive) and during the day they are most active. When Bursters are struck by lighting they would just turn into a normal creeper