Khyber Dragonmark

You possess a khyber dragonmark, the largest and most powerful expression of an aberrant dragonmark. The Khyber Dragonmark provides the following benefits:

• Your Constitution score increases by 1, to a maximum of 20.
• choose one 6th-level, one 7th-level, one 8th-spell, and one 9th-level spell from the sorcerer spell list. You learn these spells and can cast them through your mark. Once you cast a spell, you must finish a short or long rest before you can cast it again through the mark. Constitution is your spellcasting ability for these spells.
• You can control the flow of your life force to better command the power within your aberrant dragonmark to suit your goals. Along with the benefits you gain from an aberrant dragonmark, you gain three metamagic options of your choice from the sorcerer class. Each time you cast one of your aberrant spells, you can spend one Hit Die to use a metamagic option. After using any of these options, roll the spent Hit Dice, you take damage equal to the total.