Extra Vessel

Extra Vessel
Flavor text	"HP up"

Extra Vessel is a trinket added in the initial release of Fiend Folio.

Effects

• While held, Extra Vessel can be filled by picking up a Red Heart, and takes damage first before the rest of Isaac's health bar.
  • The trinket functionally acts as another Red Heart container, and can be half-depleted when taking half a heart of damage, or fully depleted when taking a full heart of damage.
  • Red Hearts will fill any of Isaac's empty Red Heart containers first before filling Extra Vessel.

Notes

• Extra Vessel can not be filled by a Rotten Heart or Morbid Heart.
• Damage taken with the trinket filled does not reduce the chance for Devil Rooms or Angel Rooms to appear.
• The trinket effectively grants a Red Heart container to characters who can not have them ( ???, The Lost, Dark Judas, Tainted ???, Tainted Lost, Tainted Judas, and Tainted Forgotten ), allowing them to use Red Hearts for health.
  • Keeper and Tainted Keeper will not be able to be fill Extra Vessel outside of co-op, as all Red Hearts that appear are automatically turned into Blue Flies.

Interactions

• Holy Mantle: The Holy Mantle shield will be triggered before a filled Extra Vessel takes damage.
• Trinket Multipliers: No effect.
• Smelter: Smelting or gulping Extra Vessel will grant a health up, adding an empty, half-filled or full Red Heart container to the health bar based on Extra Vessel's state.
• Azurite Spindown: Using Azurite Spindown on Extra Vessel rerolls it into Fool's Gold.

Gallery

• 

  A fully-filled Extra Vessel.

• 

  A half-filled Extra Vessel.