Boon of Siberys

The Boon of Siberys can reflect either a Siberys mark or a powerful Aberrant Mark. While the people of Khorvaire have a limited understanding of dragonmarks, Siberys dragonmarks remain a complete mystery to them. The magic of these powerful marks clearly relates—visually and thematically—to the other marks in one's house. But a dragonmarked heir may spend years perfecting and mastering the powers of a mark without ever manifesting a Siberys mark. Meanwhile, an unmarked scion of a dragonmarked house might suddenly display one against all expectations. Siberys marks are mighty, unpredictable, and rare, and the dragonmarked houses keep a careful eye on anyone who manifests one. If its power can serve the house, fine—but an heir of Siberys who doesn't conceal the dragonmark's ability or remain firmly aligned with the dragonmarked house is likely to become the target of assassins.

You gain the following benefits:

Ability Score Increase. Increase one ability score of your choice by 1, to a maximum of 30.

Aberrant Magic. Choose a level 8 or lower spell from the Sorcerer spell list or a spell from the Siberys Dragonmark Spells table (the table includes dragonmark suggestions if you'd like to associate a spell with one of the marks). You always have that spell prepared. You can cast it once without a spell slot or spell components, and you regain the ability to cast it in that way when you finish a Short or Long Rest. You can also cast this spell using any spell slots you have of the appropriate level. Intelligence, Wisdom, or Charisma is your spellcasting ability for this spell (choose when you gain this feat).

Siberys Dragonmark Spells: