The Mossy Hammer is a Pickaxe and a weapon rolled into one item, and it’s the first thing most players will want to spend a 
Nature Crystal on. A swing hits for 9 damage, it mines quicker than a 
Netherite Pickaxe does, and right-clicking a block sets off a shockwave that hurts and poisons everything standing near you.
All of it traces back to the Mossy Temple out in the Jungle, as that’s where the Overgrown Colossus sleeps and the Colossus is the only thing that drops a Nature Crystal. You’ll only get one crystal per kill, and the 
Mossy Chestplate and the 
Totem Of Moss each want one as well, so the first temple you clear will cover one of the three and no more.
Obtaining
Finding the temple is the first job, and the mod gives you a locator for it. An 
Eye Of Moss is crafted from 4 
Moss Blocks around an 
Ender Pearl, and it flies off toward the nearest Mossy Temple within 100 chunks like an 
Eye of Ender.
The temples generate in Jungle and Sparse Jungle, roughly 35 chunks apart, so expect a bit of a trek. Bamboo Jungle isn’t on the list, so if the Eye won’t throw, head for ordinary Jungle instead.
The Colossus is asleep when you arrive and takes nothing, damage or Potion effects, until something wakes it. Once it’s up, 
Arrows are ignored and Splash Potions do nothing either, so it’s a melee fight, and it breaks up the temple around it as it goes. Its attacks and the Poison Nova are covered in the Overgrown Colossus article.
Overgrown Colossus Drops
With the crystal in hand the hammer is a plain 
Crafting Table recipe, no smithing or special station needed. It wants 4 
Chiseled Stone Bricks, a Moss Block, the Nature Crystal and a single 
Stick, and it comes out with full durability.
None of the side materials are hard to come by. Chiseled Stone Bricks can be made from 2 
Stone Brick Slabs stacked in a Crafting Table, or cut straight from 
Stone Bricks on a 
Stonecutter, which costs the same stone and skips the slab step.
Moss Blocks come out of Lush Caves, and the Mossy Temple is covered in them as well. Once you’re carrying one, 
Bone Meal used on it spreads moss across the stone around it, so you can farm as many as you need.
Usage
In the main hand the hammer reads 9 attack damage at 0.8 attack speed, which works out at one full-power swing every 1.25 seconds. Clicking faster than that just drops weak hits in, so it’s worth watching the swing bar refill before committing. Durability sits at 850, and 
Iron Ingots repair it on an 
Anvil, as Iron is the repair material its tier is built on.
Mossy Hammer
Diamond Pickaxe
Netherite Pickaxe
It counts as a Pickaxe for everything you’d expect one to do, and its mining level sits above Netherite, so 
Obsidian, 
Ancient Debris and anything else a Pickaxe can break will drop properly.
The 12 mining speed is quicker than Netherite’s 9 as well, though that shorter durability bar is the trade, and mining with it burns through the same tool you were planning to fight with.
The Shockwave
Point at a block and right-click to set the ability off, which is why nothing happens when you right-click thin air. Every living thing within about 3 and a half blocks of you takes a flat 10 damage, gets Poison for 2 seconds and a small pop upwards, with a loud blast and a shake of the screen.
The cooldown is 3 seconds and it costs no durability at all, so you can lean on it every time it comes back. That makes it the part of the hammer you’ll use most in a fight, with the swings filling the gaps between presses.
That 10 is a fixed number and doesn’t scale with Sharpness or anything else on the hammer, which makes it far better against a crowd than against a single tough target. The Poison and the pop upwards only land on whatever the damage itself lands on, so anything that shrugs the hit off walks away clean.
Targets are picked by area alone with no line of sight involved, so a wall or a floor between you and a mob won’t save it. Tamed pets you own are skipped, your Mossy Golem from the Totem Of Moss included, but any other player standing close will be hit unless they’re in Creative. The cooldown starts whether or not anything was in range.
The shockwave hits every mob around you that isn’t your own pet, 
Villagers and 
Iron Golems included. Setting it off inside a village will turn the Golems on you and cost you trading discounts, so save it for the temple.
Out in a temple or a cave none of that matters, and the wide radius is the whole point. Just check what’s standing next to you before you press it in a village or near your own animals, since the damage doesn’t care who it lands on.
Enchantments
The hammer takes both halves of the list, as weapon enchantments and Pickaxe enchantments are each allowed on it at an 
Enchanting Table, and Mending is permitted on top. Unbreaking sits outside all three of those groups, so the table won’t offer it. Sharpness and Looting matter most if you’re carrying it as your weapon, whereas Efficiency and Fortune make more sense if it’s doing your mining too.
Enchantability is only 2, well under the 10 on a 
Diamond Pickaxe, so table offers on it tend to come out thinner than you’d get on ordinary gear. Leveling up to 30 and stacking Bookshelves is still worth doing, it just means fewer second and third enchantments in the same roll.
Tips
Open every group fight with the shockwave rather than saving it, as it costs nothing but time. Poison and the upward pop land together, which gives you a beat to line up a proper swing while everything is still dropping back down.
Carry a second Pickaxe if you’re heading underground with the hammer, as 850 durability goes quickly on a mining trip and you’ll want the bar full when you meet something. Iron Ingots on an Anvil top it back up, so a few spare Ingots in the bag covers you either way.
Think about which crystal to spend first. The Totem Of Moss is a strong opener on a return trip to a Mossy Temple, since the golem it summons fights alongside you and the shockwave skips it entirely, and the hammer and the Mossy Chestplate can follow on later kills.
FAQ
It only comes off the Overgrown Colossus, which sleeps inside the Mossy Temple in Jungle biomes, and the crystal drops every single time you kill one. There’s no 
Chest version of it and no recipe for it, so a second crystal means a second temple. An Eye Of Moss, crafted from 4 Moss Blocks and an Ender Pearl, will point you at the nearest one.
Anything tamed that belongs to you is skipped, so your Wolves, your Cats and the Mossy Golem summoned from a Totem Of Moss can all stand right next to you safely. Everything else in range is fair game, including Villagers and other players who aren’t in Creative. Pets belonging to somebody else aren’t protected either.
That line describes moss appearing under anything the shockwave catches while you’re carrying Bone Meal, but the code that placed those blocks isn’t wired up in version 2.2.3. Carrying Bone Meal changes nothing, so don’t bother packing it for the hammer.
The 4 block radius the same tooltip quotes is generous too, as the real reach is about 3 and a half. The damage, the Poison and the knock upwards all work exactly as described, so treat the moss part as a leftover from an earlier build.
Iron Ingots on an Anvil will do it, since Iron is the repair material behind the hammer’s tier, and each Ingot puts back a quarter of the 850 bar. Mending works as well and saves the Iron entirely. Using the shockwave costs no durability at all, so most of the wear comes from mining and from ordinary swings.
