Straw Man

The Straw Man is the fourth boss of the game. His first appearance is at day 15. He has 3 attacks: However, with the IonCannon, it isn't a *very* tough fight. You will kill him pretty easily. If you max out everything, you may kill him in less than two minutes.
 * 1) He summons mini-bosses that act exactly like him.
 * 2) Normal attack
 * 3) Whirlwind attack (combined with number 1 is deadly, especially if you don't have that much health remaining)

Rewards
If you kill him at first, he will drop the AK-47. In Co-Op Mode, he will drop one of 3 parts required to get the IonCannon.