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Fourth Key

Adds a fourth key and increases the difficulty of the final act. Either can be disabled in the mod settings.

Special Interactions with the following mods:

• Always Never Keys
  
  • Amethyst key will react to settings
    
  • When forced to add, Amethyst key will be added at the start of a run
    
  • When disabled, Amethyst key won't appear, but the silhouette will remain
• Bundle of Relic mods (by Sandtag)
  
  • The Amethyst key contributes to the count for the Keybane keyword
• Downfall
  
  • The Amethyst Key can be broken at campfires to obtain a special relic: at the start of combat gain 1 energy or draw 1 more card
    
  • When the merchant is defeated, the Amethyst Key will be included in the rewards
    
  • Increases the difficulty of Downfall's act 4
• HugYouRelics
  
  • When the player has the Padlock relic and Amethyst key, gain 3 regen at the start of combat
• Neat the Spire
  
  • Compatibility with Gilthead
• Pale of the Ancients
  
  • Obtaining the Amethyst Key grants additional buffs in Pale of the Ancient's Act 4: when holding the Amethyst key, gain 1 mantra every turn
• Shop Grid
  
  • Amethyst key now uses the Shop Grid API to display inside of shops
• Spire Biomes
  
  • All 4 keys are required for the Keymaster Zone to spawn instead of just the 3 base keys
    
  • At the start of battle in the Keymaster Zone, gain 1 energy or draw 1 card

To obtain the fourth key: obtain at either the shop or a special event
Act 4 difficulty increase: the spear & shield have a burning elite modifier; the heart has a burning elite modifier, more health, a higher heartbeat effect, and a lowered invincibility effect

Artist who did the original thumbnail (independent of this mod) and inspiration for this mod:
redditor u/Exylas
I photoshopped their thumbnail to make the assets for this so many thanks for them for the inspiration.

Know of a mod that would be cool to see integrated with Fourth Key? Let me know!

Github: https://github.com/TheDanDLion/FourthKey

Known issues:

• key not really animated with the shop screen