it took me the better part of 2 days and around 50 obsidian crates for ONE LAVAPROOF FISHING HOOK. I then got a second one on the very next crate, and right
Terraria Hellstone Guide: Bring Your Obsidian - Indie Game Culture
Terraria how to get Obsidian Skull (EASY) | Terraria 1.4.4.9 Obsidian Skull - YouTube