Boom Spider

Boom spiders are pale-greenish spiders created by placing a spider egg next to a cocooned creeper. They create explosions, as their name and origin suggest, when they attack. However, as these explosions hurt friends, foes, and themselves (With the third being most likely), they are not optimal for an army as the second an enemy comes within aggro range, they'll try to attack and kill the entire group of spiders they're with.