You have come in close contact with the Void Plane.  Whether you were seeking great power, searching for answers, or simply wishing to explore the various planes, you have been suffused with this eldritch energy.  You gain the following benefits:

• Increase your Constitution, or Charisma score by 1, to a maximum of 20.
• You learn the blindness/deafness spell and one 1st-level spell of your choice. The 1st-level spell must be from the enchantment or necromancy school of magic. You can cast each of these spells without expending a spell slot. Once you cast either of these spells in this way, you can’t cast that spell in this way again until you finish a long rest. You can also cast these spells using spell slots you have of the appropriate level. The spells’ spellcasting ability is the ability increased by this feat.