Hearthstone & MTG Arena Spire

A three-way mashup: Slay the Spire 2 (host) invaded by Hearthstone and Magic: The Gathering Arena.

Real cards from both games become cards and enemies inside Slay the Spire 2. Their names, artwork text and numbers are read at runtime from your own installed copies of Hearthstone and MTG Arena — nothing from either game is bundled in this download.

What it adds

• A themed invasion across the acts. The spire is overrun by Hearthstone minions and MTG Arena creatures: Murloc Raiders, Flame Imps, Bovine Skeletons, Bloodbraid Elves, Zombie Ogres and a Blue Dragon, woven into the existing acts as extra encounters (both regular fights and an elite).
• New cards to play. Fireball, Frostbolt, Pyroblast, Flamestrike, Arcane Intellect, Holy Light, Blessing of Kings, Kor'kron Elite and Abusive Sergeant from Hearthstone; Lightning Bolt, Counterspell, Grizzly Bears, Serra Angel, Shivan Dragon, Llanowar Elves, Wrath of God, Divination, Ponder and Giant Growth from MTG Arena.
• Names and rules text in your language. Card names and text come from your own install in whichever of the 16 supported languages you play in.

How it works

On first launch a small converter reads the card database from your Hearthstone and MTG Arena installs and prepares a local cache. Slay the Spire 2 then reads that cache and turns the cards into playable content. It only ever reads the other games' files — it never launches, modifies or interacts with Hearthstone or MTG Arena, and nothing from them is uploaded or redistributed.

Requirements

• Slay the Spire 2 installed.
• Hearthstone installed (its card database is read locally).
• Magic: The Gathering Arena installed (its card database is read locally).
• Windows.

Notes

• Solo play. Built against the current Slay the Spire 2 version.
• Hearthstone has anti-cheat; this mod never touches its client, only reads its data files offline.
• MIT licensed. Remixes welcome.