Slaughter

Slaughter is an item that activates and deactivates Slaughter Mode. Slaughter Mode has multiple effects on gameplay: It can be crafted at any Altar and does not have any ingredients. Slaughter can only be activated and deactivated when the world is in Death Mode, and will instantly kill the player and despawn any active bosses if used whilst any boss is alive!!
 * All vanilla and fanmade bosses are severely buffed and have unique Al changes to increase difficulty dramatically.
 * Speedy Savior and Heavy Anger boost the player's damage four times as much, from 100% to 400% (160% to 650% with all three powerups) and 300% to 1000% respectivel.
 * All enemy spawn rates are boosted to 50%!!
 * Enemy damage is boosted to 60%, This boost is a little bit difficult with War Mode items.
 * Damage Reduction (DR) is hard capped at 40%, But Ginger Cat Armor can increase the hard cap to 50%!!