Infernal Rune Shaper

You have delved into the arcane secrets of the Nine Hells, studying the ancient runes of devils and fiends. Through pain and focus, you can inscribe these runes into objects—or even your own flesh—to channel their power.

Comprehend Languages. You learn the comprehend languages spell. You can cast this spell without expending a spell slot, but you must finish a long rest before you can do so again in this way. You may also cast it using any spell slots you have.

Rune Magic. You know a number of runes equal to half your proficiency bonus (rounded down), chosen from the Rune Spells table. Each rune is a sigil of infernal power, a fragment of a devil’s essence. Whenever you finish a long rest, you can inscribe each rune you know onto a nonmagical weapon, armor, piece of clothing, or other object you touch. Alternatively, you may carve the runes into your own skin as a ritual of devotion and mastery.

When a rune is inscribed—on an object or yourself—you temporarily learn the 1st-level spell associated with that rune, as specified on the Rune Spells table. You know these spells until you finish a long rest, at which point the runes fade. While you bear a rune-marked object or have a rune etched into your flesh, you can cast the associated spell using any spell slots you have.

You can also invoke a rune you bear (on an object or your body) to cast its spell without expending a spell slot or using material components. Once you do so, that particular rune cannot be invoked again until you finish a long rest.

Your spellcasting ability for the rune magic is Intelligence, Wisdom, or Charisma (chosen when you take this feat).

Mastery of Runes. Each time you gain a level, you may replace one rune you know with another from the Rune Spells table, representing your evolving understanding of infernal power.