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Steam News29 April 20262mo ago

Community Update #15 - Spell Mutators, 1500 Mutations & Level-Up System

Hi Everyone, Quick look at what's brewing in the crypt: Spell Mutators — we're building a system that lets spells fundamentally change behavior mid-run.

Full notes

Full CODEX MORTIS update

Read the full published notes in a cleaner layout. The original post stays linked below.

What changed

0 fixes2 additions7 changes0 removals
  • Gameplay
  • Balance
  • Compatibility
addedSpell Mutators — we're building a system that lets spells fundamentally change behavior mid-run. Not just bigger numbers — new patterns, new triggers, weird side effects. Same starter spells, completely different runs.
changed1500 mutations in review — yes, fifteen hundred. All currently being tested for balance, feel, and synergy interactions. The ones that survive will start landing in builds over the coming weeks.
addedNew Level-Up System in testing — we're reworking progression so leveling up actually feels like a decision:
changedRarity now affects how many upgrades are on a single card — rarer cards carry more upgrades, spread across more spells.
changedMilestone levels grant a mutation to one of your spells.
changedNo more spell level cap.

CODEX MORTIS changes

addedSpell Mutators — we're building a system that lets spells fundamentally change behavior mid-run. Not just bigger numbers — new patterns, new triggers, weird side effects. Same starter spells, completely different runs.
changed1500 mutations in review — yes, fifteen hundred. All currently being tested for balance, feel, and synergy interactions. The ones that survive will start landing in builds over the coming weeks.
addedNew Level-Up System in testing — we're reworking progression so leveling up actually feels like a decision:
changedRarity now affects how many upgrades are on a single card — rarer cards carry more upgrades, spread across more spells.
changedMilestone levels grant a mutation to one of your spells.

Hi Everyone,

Quick look at what's brewing in the crypt:

Spell Mutators — we're building a system that lets spells fundamentally change behavior mid-run. Not just bigger numbers — new patterns, new triggers, weird side effects. Same starter spells, completely different runs.

1500 mutations in review — yes, fifteen hundred. All currently being tested for balance, feel, and synergy interactions. The ones that survive will start landing in builds over the coming weeks.

New Level-Up System in testing — we're reworking progression so leveling up actually feels like a decision:

  • Rarity now affects how many upgrades are on a single card — rarer cards carry more upgrades, spread across more spells.

  • Milestone levels grant a mutation to one of your spells.

  • No more spell level cap.

  • We're also testing unlocking spells mid-run instead of having your full kit from the start.

All of this is live on the Discord beta branch right now — go break it, tell us what feels good and what doesn't.

Reminder: the beta branch is not the stable branch. Expect bugs, balance swings, and things changing under your feet. That's the point — it's where we figure out what works before it ships to everyone.

Thank you for playing CODEX MORTIS. More updates are on the way. Cheers!

  • CRUNCHFEST & GROLAF

Source

Steam News / 29 April 2026

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