The Galaxy Sword in Stardew Valley is the game’s first ironclad endgame weapon, and getting it comes down to one of the rarest items in the valley: the Prismatic Shard. Take a shard to the Three Pillars in the Calico Desert and you walk away with a Level 13 sword that deals 60-80 damage. This guide covers exactly where Prismatic Shards drop, how the pillar ritual works, how to unlock the rest of the Galaxy weapons, and how to forge them into the strongest Infinity weapons in the game.
Quick answer
- Find a Prismatic Shard (best odds: Mystic Stones in the Skull Cavern, which have a 25% chance to drop one).
- Travel to the Calico Desert and walk east to the Three Pillars.
- While holding the Prismatic Shard, step onto the center tile between the three pillars.
- The shard is consumed and you receive the Galaxy Sword.
- This unlocks the Galaxy Hammer (75,000g) and Galaxy Dagger (35,000g) at the Adventurer’s Guild.
- Forge any Galaxy weapon with 3 Galaxy Souls + 60 Cinder Shards to create its Infinity version.
Where to find Prismatic Shards
The Prismatic Shard is one of the rarest items in the game, so a single run rarely guarantees one. Here are the confirmed sources and their drop rates:
- Mystic Stones – 25% chance. These glowing stones appear in the Mines (floors 100+), Skull Cavern, the Quarry, and the Volcano Dungeon. This is the single best per-rock chance, which is why Skull Cavern runs are the most reliable farm.
- Meteorite – 25% chance when broken (a meteorite can occasionally land on your farm).
- Skull Cavern treasure room – about 3.8% (1/26) chance.
- Iridium Nodes – 3.5% chance (in the Skull Cavern, Quarry, and Volcano Dungeon).
- Omni Geodes – 0.4% chance per geode cracked at Clint’s.
- Monster drops – Serpents and Mummies drop one at 0.1%, Shadow Brutes and Shadow Shaman at 0.05%, and Wilderness/Iridium Golems at 0.1% after Combat Level 10. After reaching the bottom of the Mines, any monster has a 0.05% chance to drop one.
- Mystery Box 0.4% / Golden Mystery Box 0.79%.
- Rainbow Trout Fish Pond – 0.09% daily chance once the pond population reaches 9 or more.
- Fishing Treasure Chests – roughly 0.012% after reaching Fishing level 6.
- Statue of True Perfection – produces one Prismatic Shard per day (a reward for reaching Perfection).
- Volcano Dungeon – one waiting in a chest at the top the first time you arrive.
- Emily’s Desert Festival shop – purchasable for 500 Calico Eggs.
In practice, deep Skull Cavern runs (mining Mystic Stones and Iridium Nodes, killing Serpents and Mummies along the way) are by far the fastest way to find your first shard. Bombs and Staircases help you descend quickly to where shards become more common.
Getting the Galaxy Sword (the pillar ritual)
Once you have a Prismatic Shard, head to the Calico Desert (reachable via Pam’s bus once the Vault bundles are complete, or the minecart on Ginger Island). From the bus stop, travel east across the sand until you reach the Three Pillars, a trio of standing stones out in the desert.
Make sure the Prismatic Shard is selected in your active inventory slot (held in hand). Walk onto the center tile between the three pillars. The shard is consumed and the Galaxy Sword appears. A cryptic hint about this ritual can be read on the Dwarvish headstone in the Graveyard, though the text stays in Dwarvish until you find the Dwarvish Translation Guide.
A few things worth knowing about the Galaxy Sword:
- It is a Level 13 sword dealing 60-80 damage with +4 Speed.
- It will not be lost if your health drops to 0 in the Mines.
- You can only obtain it with a Prismatic Shard once. If you sell or lose it, you can rebuy it from Marlon for 50,000g at the Adventurer’s Guild.
- Obtaining it unlocks the Galaxy Hammer and Galaxy Dagger in the Guild shop.
Other Galaxy weapons
The Galaxy Sword is only the first of three Galaxy weapons. Unlike the sword, the other two are purchased for gold from the Adventurer’s Guild after you’ve claimed the sword — you don’t need extra Prismatic Shards for them.
- Galaxy Hammer (club) – 75,000g. Level 12, deals 70-90 damage with +2 Speed and +5 Weight.
- Galaxy Dagger – 35,000g. Level 8, deals 30-40 damage with +1 Speed, +1 Crit Chance, and +5 Weight.
Each weapon type suits a different combat style: the sword is the reliable all-rounder, the hammer hits hard and knocks enemies back, and the dagger trades raw damage for fast strikes.
Upgrading to Infinity weapons
Each Galaxy weapon has a stronger final form — the Infinity weapons — created at the Forge in the Volcano Dungeon on Ginger Island. The upgrade requires Galaxy Souls and Cinder Shards:
- Infinity Blade – Galaxy Sword + 3 Galaxy Souls + 60 Cinder Shards. Level 17, deals 80-100 damage with +4 Speed and +2 Defense. It is the most powerful sword in the game.
- Infinity Gavel – Galaxy Hammer + 3 Galaxy Souls + 60 Cinder Shards.
- Infinity Dagger – Galaxy Dagger + 3 Galaxy Souls + 60 Cinder Shards.
The upgrade is done in three steps at the Forge: each step consumes 1 Galaxy Soul and 20 Cinder Shards, for a total of 3 souls and 60 Cinder Shards per weapon. Any enchantments and gem (forge) upgrades already on the weapon are kept.
Galaxy Souls come from a few sources. The most direct is buying them from Qi’s Walnut Room for 40 Qi Gems each. After killing at least 50 Dangerous Monsters, they can also be bought from the Island Trader for 10 Radioactive Bars (on the last day of a season) or dropped by Dangerous Monsters in the “Danger in the Deep” Mines or “Skull Cavern Invasion” runs. Cinder Shards are gathered throughout the Volcano Dungeon, so the Forge upgrade naturally lines up with Ginger Island progress.
Take on the desert together
Skull Cavern shard runs and Dangerous Monster hunts are even better with a friend hauling bombs and watching your back. Spin up a Stardew Valley server from XGamingServer to farm Prismatic Shards and Galaxy Souls as a team, and check the documentation if you need a hand getting everyone connected.
Frequently asked questions
What’s the fastest way to get a Prismatic Shard?
Deep Skull Cavern runs. Mystic Stones there have a 25% drop chance, Iridium Nodes 3.5%, and the Serpents and Mummies you fight can each drop one. Using bombs and staircases to descend quickly maximizes how many nodes and monsters you encounter.
Do I lose my whole stack of Prismatic Shards at the pillars?
No. The ritual consumes only one Prismatic Shard, even if you’re carrying several. A bug in older versions that consumed the entire stack was fixed in version 1.4.
Can I get a second Galaxy Sword with another Prismatic Shard?
No. Once you’ve obtained the Galaxy Sword, the pillar ritual won’t work again. If you sell or lose the sword, you can buy a replacement from Marlon at the Adventurer’s Guild for 50,000g.
Do I need Prismatic Shards for the Galaxy Hammer and Dagger?
No. After you obtain the Galaxy Sword, the Hammer and Dagger simply appear for purchase at the Adventurer’s Guild — 75,000g for the Hammer and 35,000g for the Dagger. They cost gold only.
What do I need to make Infinity weapons?
Each Infinity weapon is forged from its Galaxy counterpart using 3 Galaxy Souls and 60 Cinder Shards total (1 soul and 20 Cinder Shards per step, three times) at the Forge in the Volcano Dungeon. Galaxy Souls are bought with Qi Gems in Qi’s Walnut Room, traded for Radioactive Bars, or dropped by Dangerous Monsters.
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