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Mastema
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Eternal Card trinket
Eternal Card is an unlockable trinket in Mastema, a mod for The Binding of Isaac.
Description
Using a card has a 10% chance of granting an 
Eternal Heart.
Does not work with any consumable that is not considered a card.
How to unlock?
Defeat Isaac as 
Mastema.
Special synergies
The following special synergies and interactions for Eternal Card have been documented.
| Mod | Item | Synergy |
|---|---|---|
| --- | Trinket multipliers | Chance is doubled. |
| --- | Blank Card | Will not give an eternal heart if a card was used through it. |
* Note that not all possible synergies and interactions are listed here.
External links
- Check out the trinket description on the mod's external Wiki.
- Download Mastema from the Steam Workshop.
Life Savings 
Twisted Faith 
Mantled Heart