---
key: mechanic/deck-building--family-market
type: mechanic
id: deck-building--family-market
lang: en
title: Markets and card offers
summary: >-
A market determines which cards are available now. Offer size and refresh
rules affect planning and the value of passing.
updatedAt: '2026-10-21'
status: active
url: 'https://gamemechanics.pro/en/knowledge/mechanic/deck-building--family-market/'
jsonUrl: >-
https://gamemechanics.pro/api/v1/knowledge/en/mechanic/deck-building--family-market.json
markdownUrl: >-
https://gamemechanics.pro/content/knowledge/en/mechanic/deck-building--family-market.md
aliases:
- Card offers
tags:
- Deck building
- Core rules
sourceIds:
- source-c4ddb750dc94a3b4
- source-7f09c8a736762f4f
sources:
- id: source-c4ddb750dc94a3b4
title: Star Realms rules
url: 'https://www.starrealms.com/learn-to-play'
verifiedAt: null
- id: source-7f09c8a736762f4f
title: Slay the Spire
url: 'https://www.megacrit.com/press-kits/slay-the-spire/'
verifiedAt: null
relations: []
placements:
- catalogId: deck-building
id: family-market
title: Deck building
url: 'https://gamemechanics.pro/en/mechanics/deck-building/#family-market'
categoryIds:
- section-1
supersededBy: []
attributes:
preview:
updatedAt: '2026-10-21'
title: Card offers
description: >-
A market determines which cards are available now. Offer size and refresh
rules affect planning and the value of passing.
image:
src: images/mechanics/slay-the-spire-shop.webp
width: 1440
height: 810
game: Slay the Spire
sourceUrl: 'https://www.megacrit.com/press-kits/slay-the-spire/'
originalUrl: 'https://www.megacrit.com/images/ss4.jpg'
credit: Mega Crit
rights: © Mega Crit. All rights reserved.
caption: The merchant’s selection
alt: >-
Slay the Spire: differently priced cards and additional services at one
merchant.
markers:
- x: 39
'y': 29
label: The currently available card selection
- x: 38
'y': 50
label: Prices let the player compare offers
tips:
- Explain when an offer will refresh or disappear.
- Keep passing up an offer a meaningful option.
examples:
- title: Slay the Spire
url: 'https://www.megacrit.com/press-kits/slay-the-spire/'
endsAt: null
provenance: >-
Original editorial design catalog consolidated from project discussions on
2026-10-20. Complete discussion item lists and contextual limitations are
preserved; linked primary sources support specific techniques, not the entire
classification. English translation was prepared with machine assistance and
editorial review.
license: CC-BY-4.0
codeLicense: MIT
attribution: gamemechanics.pro contributors
catalogKey: catalog/deck-building
---
# Markets and card offers
id: deck-building--family-market
type: mechanic
key: mechanic/deck-building--family-market
lang: en
status: active
url: https://gamemechanics.pro/en/knowledge/mechanic/deck-building--family-market/
A market determines which cards are available now. Offer size and refresh rules affect planning and the value of passing.
## At a glance
[Slay the Spire](https://www.megacrit.com/press-kits/slay-the-spire/) · © Mega Crit. All rights reserved.
1. The currently available card selection
2. Prices let the player compare offers
- Explain when an offer will refresh or disappear.
- Keep passing up an offer a meaningful option.
- [Slay the Spire](https://www.megacrit.com/press-kits/slay-the-spire/)
## How it works
What cards are available for receipt and how the offer changes.
## Variants
### Variants and applications
- Fixed supply. Rule: The open set of card types is known in advance; Players purchase copies from their respective stacks.
- Market row. Rule: There are several cards on the market, and the vacant spaces are replenished from the common deck.
- Split pile. Rule: The type of card available changes as the stack is sorted; Bottom cards are temporarily unavailable.
- Private market. Rule: The offer is available only to a specific player or his team.
- Blind purchase. Rule: The player pays for a card or package without knowing the exact contents until receipt.
- Reroll. Rule: For a fee or through an effect, the player replaces part of the market or reward options.
- Reservation. Rule: The card is temporarily assigned to the player for later receipt.
- Market banish. Rule: The player removes an available card, revealing a new one or denying the opponent the opportunity to receive it.
- Pool manipulation. Rule: Unlocking, eliminating, or changing the weight of card categories affects future rewards and merchandise.
- Tiered supply. Rule: New market levels, rarities or card sets become available after meeting the conditions.
- Conveyor market. Rule: Cards move in position, change price or disappear after a set time.
- Limited supply. Rule: Number of copies is limited; the acquisition of a card by one player reduces the capabilities of others.
## Context and limits
Design taxonomy of basic rules and options, including card operations and external systems. The number of entries is not a generally accepted classification of independent mechanics.
## Connected materials
## Sources and provenance
Original editorial design catalog consolidated from project discussions on 2026-10-20. Complete discussion item lists and contextual limitations are preserved; linked primary sources support specific techniques, not the entire classification. English translation was prepared with machine assistance and editorial review.
- [Star Realms rules](https://www.starrealms.com/learn-to-play) (id: source-c4ddb750dc94a3b4)
- [Slay the Spire](https://www.megacrit.com/press-kits/slay-the-spire/) (id: source-7f09c8a736762f4f)
CC-BY-4.0 · gamemechanics.pro contributors