YouTube tutorials has taught you the wonder of rune carving, granting you the following benefits:

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

You know a number of runes equal to half your proficiency bonus (rounded down), chosen from the Rune Spells table. You can inscribe each rune you know onto one nonmagical weapon, armor, piece of clothing, or other object you touch. You learn the 1st-level spells that correspond to the runes you inscribed, as specified on the Rune Spells table, and you know those spells until the nonmagical object is destroyed or until a long rest. 

Your spellcasting ability for this feat is Wisdom.

Each time you gain a level; you increase the number of runes you know from the Rune Spells table.