The Prismatic Heart sits in an awkward spot in The Forge: it is both a rare late‑game ore and a key quest item for one of the game’s most important pickaxes. If you are pushing into Island 3 and the Raven Cult questline, understanding how this heart drops and what it does will save a lot of frustration.
What the Prismatic Heart is
Prismatic Heart is a Legendary ore tied to Frostspire Expanse (Island 3). It is not mined from the environment. Instead, it drops from a specific enemy and then behaves like a high‑value forging material with strong offensive traits.
In inventory, the ore is described as dense and unsafe, and visually it appears as a floating, fractured crystal core radiating pale, icy light, with four smaller shards orbiting around it. That visual makes it easy to distinguish from other hearts and ores in your bag.
Where to get Prismatic Heart in The Forge
Prismatic Heart only drops from the Prismarine Spider in Frostspire Expanse. You will find this enemy inside the Spider Cave on Island 3. The Prismarine Spider usually stays near the edge of the cave and fights with support from smaller spiders in the room.
Step 1: Travel to Island 3 (Frostspire Expanse) and enter the Spider Cave. Make sure you are prepared for cold‑area combat and multi‑target fights.
Step 2: Move through the cave until you reach the Prismarine Spider’s area near the edge of the cavern. Clear any smaller spiders that rush you so you are not overwhelmed during the main fight.
Step 3: Focus on the Prismarine Spider, staying mobile. It can attack from range, so keep dodging and do not tank its projectiles for long.
Step 4: Defeat the Prismarine Spider and repeat the encounter. The Prismatic Heart is an enemy drop, so you will need to farm this fight multiple times.
The drop chance is extremely low overall, with values around a 1/33,333 baseline, with a more favorable rate around 1/15 in the appropriate context. Practically, you should expect to run the Spider fight many times before seeing a Prismatic Heart drop. Treat it as a long‑term farm, not a quick pickup.
Because the encounter can be punishing if you walk in undergeared, it helps to enter with stronger armor and weapons crafted from higher‑tier recipes rather than basic gear from earlier islands.
Prismatic Heart stats and traits
Once you have the ore, its main value is in forging. Prismatic Heart comes with a high forging multiplier and several offensive traits that apply when the ore is used in weapons.
| Property | Value |
|---|---|
| Rarity | Legendary |
| Drop source | Prismarine Spider (Frostspire Expanse, Spider Cave) |
| Drop chance | Very low (around 1/33,333, with a 1/15 contextual chance) |
| Forging multiplier | 5.5× |
| Sell price | 112.5 gold |
When you use Prismatic Heart in weapons, it adds three notable passive traits:
- Ice – 15% chance on hit to freeze enemies for 2 seconds, with an 18‑second cooldown.
- Critical Chance – Increases crit chance by 20%.
- Critical Damage – Increases crit damage by 5%.
These traits apply only when the ore is used in weapons. The combination of high crit chance and occasional freeze makes Prismatic Heart an offensive pick for builds that rely on frequent critical hits and basic attack uptime rather than slow, heavy bursts.
How Prismatic Heart fits into the Raven Cult questline
Beyond raw stats, Prismatic Heart is tied to a late‑game quest chain. The Raven Cult questline requires multiple hearts: Prismatic Heart, Golem Heart, and Yeti Heart. The quest itself comes from the Auron NPC inside the Raven Cave on Island 3.
Step 1: Progress through Island 3 until Raven Cave is unlocked and you can access Auron. This usually follows earlier cave and story progression on the island.
Step 2: Talk to Auron to begin the cult‑related questline. One of the steps in this chain will ask for specific hearts, including the Prismatic Heart.
Step 3: Farm the required bosses for each heart. For Prismatic Heart, return to the Spider Cave and defeat the Prismarine Spider until it drops.
Step 4: Turn in the hearts to Auron as the questline demands. Once all required hearts are delivered and the remaining objectives are completed, the questline unlocks the Dragonhead Pickaxe.
The Dragonhead Pickaxe is one of the main rewards locked behind this quest chain, so treating Prismatic Heart as a quest item first and a sellable ore second is usually the smarter move. Selling it is possible, but doing so before finishing Auron’s requests will delay your pickaxe upgrade.
Using Prismatic Heart in forging
The 5.5× forging multiplier on Prismatic Heart makes it a premium material for both weapons and armor. In weapons, you also gain the Ice, Critical Chance, and Critical Damage traits; in armor, the multiplier still applies for raw stats even though the listed traits are weapon‑only.
Step 1: Decide whether the Prismatic Heart copy you have is reserved for the Raven Cult questline. If you have only one, keep it aside until that quest requirement is safely cleared.
Step 2: Once you have extra copies, take the ore to a forge and select a weapon blueprint that benefits from high crit uptime, such as fast‑hitting melee weapons or ranged options that land many projectiles.
Step 3: Add Prismatic Heart as one of the core materials. The 5.5× multiplier boosts the resulting stats, while the Ice and crit traits turn the weapon into a strong crowd‑control and damage tool.
Step 4: For armor, use Prismatic Heart only if you are comfortable spending a rare material on survivability pieces. The multiplier helps, but you will not gain the Ice and crit passives on armor.
Because the drop rate is low, it often makes sense to reserve Prismatic Heart for your main late‑game weapon rather than spreading it across multiple experimental crafts. A single, well‑rolled weapon with strong base stats plus the Prismatic traits will usually carry more value than several minor upgrades.
When to sell Prismatic Heart
Prismatic Heart can be sold for 112.5 gold, which is a respectable amount. However, its rarity and role in quests and forging mean that selling it should be a deliberate choice.
- Keep at least one copy unspent until the Raven Cult questline is complete and the Dragonhead Pickaxe is unlocked.
- Only consider selling if you already have multiple hearts, your main weapons are set, and you need quick gold more than incremental forging power.
- Remember that the farm time for another drop is far higher than the time needed to earn 112.5 gold through other activities.
For most players, the long‑term value of Prismatic Heart in crafting and progression outweighs the short‑term gold gain from a sale.
Prismatic Heart is designed as a long‑tail objective in The Forge: a rare drop that drives repeated runs of the Spider Cave, unlocks a key quest reward, and powers some of the strongest crit‑focused weapons in the game. Treat each drop as a strategic resource, plan around the Raven Cult requirements first, and then turn extra hearts into the weapons that will carry you through the rest of Frostspire Expanse.
