---
title: A Card's Value Depends on Which World Carries It
date: 2026-07-02
status: current
tags: [meta-progression, destiny, card-value, cross-world, design-lesson]
fg-type: lesson
fg-sources: [.lore/work/brainstorm/overgrown-mall-world.md]
fg-status: current
fg-evidence:
  code:
    - src/data/allCards.json
    - src/data/worlds/zombie-big-box/cards.json
    - src/data/worlds/overgrown-mall/cards.json
  symbols:
    - Regroup
    - DestroyCardInHand
---

# A Card's Value Depends on Which World Carries It

`zombie-big-box`'s reward card `Regroup` (`DestroyCardInHand 0-3`) is mediocre in its home world — thinning a card or two rarely matters against a swarm you're fighting head-on. Carried into `overgrown-mall`, the same card becomes premium: `overgrown-mall`'s entire response archetype is "prune and profit," and a card whose only job is destroying cards in hand is exactly what a Spore-pruning build wants.

This was the first concrete case where a card's power reads differently depending on which world's deck it sits in, rather than depending only on its own text. `bird-building`'s "travel light" tools (hand-thinning, efficiency-over-force cards) are the same kind of fit for `overgrown-mall` — both worlds reward a thin deck, just for different reasons (attrition survival vs. pollution management).

## Why It Matters

This is the reason Destiny mechanisms that let cards or rewards cross between worlds (see [[destiny-progression]]) are interesting rather than merely convenient: if meta-progression lets a card earned in one world show up as a reward option or loadout choice in another, old "mediocre" rewards can become retroactively interesting builds instead of dead weight. It also means a world's signature verb (see [[theme-authoring]]) shapes not just its own cards but the *value* of every card a player might carry into it.

Related: [[overgrown-mall-world]], [[destiny-progression]], [[theme-authoring]]