If you’ve spent any time digging through the Underground or Cavern layers of your Terraria world, you’ve probably stumbled on a weird, unassuming item called the can of worms in Terraria. A lot of new players write it off as a joke item, or pop it without thinking and get swarmed by giant worm enemies before they can react. The truth is, this little consumable is way more useful than most players realize, if you know when and how to use it correctly. This guide breaks down everything you need to know to stop wasting this rare, non-craftable item, and start using it to speed up your playthrough.
What Exactly Is the Can of Worms in Terraria?
First off, let’s clear up what this item actually does, because the in-game description is pretty vague. When you activate a can of worms, it spawns between 2 and 5 large worm-type enemies, scaled to your current game progression. In pre-Hardmode, you’ll get Devourers, while Hardmode uses spawn faster, harder-hitting Digger Worms. If you use it in a Corruption or Crimson biome, the worms will be biome-specific, dropping unique materials for that world type.
You can’t craft a can of worms, so every one you find is a limited resource. Most are found in gold chests in the Underground and Cavern layers, but you can also get them as rare fishing rewards in jungle biomes, or as occasional drops from large worm enemies themselves. Since you can’t farm them reliably, you don’t want to waste them on random uses when you might need them later for a specific goal.
Top Use Cases for the Can of Worms
So when should you actually pop that can you’ve been hoarding in your inventory? These are the most practical, high-reward uses that make every can worth saving:
That last use case is especially helpful for new players who are struggling to afford basic gear early on. I once used three cans I found in my first cave run to farm enough gold to buy a full set of meteor armor from the Arms Dealer as soon as he spawned, which let me beat the Eye of Cthulhu on my first try. It’s a small boost, but it can make a huge difference in your early game pace.
Common Mistakes to Avoid With the Can of Worms
For all its benefits, the can of worms can cause a lot of headaches if you use it wrong. These are the most common mistakes I see new players make, so you can skip the frustration.
First, don’t use it before you have at least gold or platinum armor. Pre-Hardmode Devourers hit hard, and if you’re still running around with copper gear, they can one-shot you before you even have time to pull out your weapon. I learned this the hard way on my first playthrough, when I popped a can right after spawning and lost all my starting tools to a swarm of three Devourers.
Second, don’t use it in a small enclosed space. Worms can dig through every type of pre-Hardmode block, so if you’re in a tiny base or tight cave tunnel, they’ll swarm you from all sides and you won’t have room to dodge. Always use it in a large open area, or an arena you’ve already built for boss fights, so you have space to move.
Third, don’t waste cans on random uses when you don’t need the drops. Since you can’t craft them, popping one just for fun might mean you don’t have one later when the Angler offers a Golden Fishing Rod as a quest reward, or you need 20 Rotten Chunks to craft the Eater of Worlds summoning item. Hold onto them until you have a specific goal in mind.
Pro Tips to Maximize Your Can of Worms Rewards
If you want to get the most possible value out of every can you find, these little tricks will double or even triple the rewards you get per use.
First, pop a battle potion and place a water candle right before you activate the can. These items increase enemy spawn rates, so you’ll get 2 to 3 extra worms per can, which means 2 to 3 times more drops. It’s a small investment of resources for a huge payoff, especially if you’re farming for rare materials.
Second, use cans in the Corruption or Crimson biome if you need biome-specific drops. Worms spawned in these biomes will drop Rotten Chunks or Vertebrae, which you can’t get anywhere else, and you won’t have to deal with other annoying biome enemies like Corruptors or Face Monsters spawning while you farm.
Third, if you have a luck potion handy, drink it before popping the can. Higher luck increases the number of drops per worm, and also boosts your chance of getting rare extra drops like mining speed accessories or extra gold coins. It’s a small buff that adds up fast if you’re using multiple cans in one farming run.
Finally, if you don’t feel like fighting the worms at all, set up a small lava pit beforehand. Lead the worms into the lava and they’ll die automatically, so you just have to wait a minute and collect all the drops without taking any damage. This trick works especially well in Hardmode, when Digger Worms hit hard enough to knock you out even with endgame armor.
The can of worms in Terraria might seem like a throwaway joke item at first glance, but it’s actually one of the most useful limited consumables you can find in early and mid-game playthroughs. Whether you’re grinding for crafting materials, rushing an Angler quest, or just need quick gold to buy new gear, using it at the right time will save you hours of wandering caves looking for random worm spawns. Next time you find one stashed in a gold chest, don’t toss it in your trash slot right away—save it for when you need it most, and you’ll be glad you did.