Kostina's Nightmare Hardcore Challenge

Features:

• Adds a new mob called "Agent Zombie" to the game. When the agent zombie dies, an alarm goes off warning you of an impending airstrike! The only way to prevent the airstrike is to step on the defuser device that spawns on the ground and check all correct boxes in time.
• It also adds a new item called the Flare Gun. It can be shot into the air to use as a signal. Whenever you shoot the flare gun into the air, there is a 25% chance it will spawn a loot crate or a 75% chance it will call an airstrike.
• The airstrikes are comprised of a new mob called the Creeper Nuke. When a Creeper Nuke dies, it blows up in a massive explosion. Creeper Nukes also spawn at night sometimes and can only be safely defused with a wrench (turning them into normal creepers) -- craftable with 2 copper ingots and 2 iron ingots.