Frosthaven - Prism Guide

You cannot take every card. The Prism demands specialization. Here are the three verified builds for Frosthaven difficulty (Scenario Level 3-4).

Before looking at a single ability, you must understand the Prism's gimmick. The Prism does not have "summons" in the traditional sense (like the Boneshaper). Instead, it projects holographic "Cores" (Modes). Your hand size is 11 cards, but your "summon" limit is effectively 1 at a time unless you take specific perks.

Your X-card, Mode Switch, is the engine of the class. When you play Mode Switch (Top action), you destroy your current summoned Mode and replace it with a new one from your hand. The destroyed Mode returns to your hand, and the new Mode enters play with full HP and a free attack.

Why this matters: Your Modes are disposable, high-damage turrets. You aren't sad when a Mode dies; you are sad you wasted the action to summon it. A good Prism player cycles Modes every 1-2 turns to maximize the "on-summon" attacks.

Mandatory items (Prosperity 1-2):

Avoid: Shields (you have Force Field), any item with "spend an element" (your elements are for Modes), summon items (clutters your Mode slots). frosthaven prism guide

The Prism does not have "cards" in the traditional sense. It has Modes (persistent losses) and Skills (actions). Your hand size is effectively 10, but two cards are dedicated to Modes.

Critical Insight: The +1 attack from Fusion is a trap for new players. Do not fuse early. Fuse only when:

The Fusion penalty (-2 move on next turn) is your primary limiter. Always pair a Fusion turn with a bottom action that doesn’t require movement (e.g., Shield self, Heal, Generate element).

The Prism has low health but high reliance on modifying attacks. Your item loadout is specific.

Head Slot (Helmet):

Chest Slot (Body):

Hands (Weapons/Shields):

Small Items (Potions):

Boots:

Because the Prism's power is tied to summons, your direct damage cards are often worse than a Mode's basic attack. Here is a fast-track leveling guide. You cannot take every card

Because the Prism's Modes inherit your items' passive effects but not active ones, item selection is tricky.

The following table summarizes the effects of each Prism:

By mastering the use of Prisms, players can take their gameplay to the next level and overcome the challenges of Frosthaven.