Enruned black ora heart

Enruned black ora hearts were first introduced as the prize at the end of the Necropolis at Ebon Gate 2012, the second year at Feywrot Mire. It is a self-charging, three times a day item that had the option of four different spells: Dauntless, Prayer, Cloak of Shadows, and Bravery. Each year allowed for either upgrading (more casts per day) or the option for a new heart with a different spell. When RAISED, there is a chance the heart will curse you. In 2015, a new addition allowed players to purchase an item from the Simucoin Store that uncursed the heart as well as changing its appearance.

Analyze

The creator has also provided the following information:

This is a magical item that has some special properties.  Casting Elemental Detection (spell 405) will offer more information.

Loresong/Elemental Detection

You sense that the black ora heart is a magic item that contains the Prayer spell with a total of 3 charges when fully charged.  It recharges a single use roughly every 480 minutes.  The heart hasn't been used recently.  The heart has a darkness within, and will occasionally curse itself and some of your inventory.

Example

You raise your black ora heart skyward!
  1d100: 26 + Modifiers: 131 == 157

The runes on the black ora heart flare up and glow dark violet.
Turning your thoughts inward, you ask for the majesty of your deity to protect you.  The scent of something burning drifts past, and you sense that your prayer has been granted.
A darkness forms around your black ora heart, and settles over you.