The blood moon

The blood moon event is a terraria reference, the red blood moon will appear rarely at night ONLY on hard mode, it effects animals, makes the vicious and hostile, the already hostile mobs will double in spawn, more mob variants will appear such as the blood zombie, killer bunny, blood bat, (maybe skeleton wolf?) and more.... the mobs will start targeting the player's location, Aquatic mobs, pets, villagers, illagers, and golems Will not be affected, it takes the whole night time for the blood moon to pass, the player will be unable to sleep until the event has passed and surviving it will award the player with the achievement: Blood moon