Luck is a brand new mechanic introduced in Terraria 1.4, Journey’s End. It’s a complicated system that is usually hidden from the player, at least until you meet the wizard in hard mode. Luck or bad luck basically has an effect on all drops, mob appearances and biome unique appearances.
There are new lucky and unlucky debuffs available from Ladybugs, Potions and Torches. The ladybug luck bonus is achieved by hitting a ladybug captured and then released by a player, and this can have a huge effect on RNG drop rates for items. But it was the Torches that annoyed everyone …What Is Luck? The New Game-Changing Mechanic In Terraria 1.4 Journey’s End You Need To Know About.
Crushing crowd larvae is a key part of Terraria and always has been. RNG also has an impact on whether or not you find rare NPC appearances, like the handyman, and get your hands on rare street vendor items.