Source: Unearthed Arcana 85 - Wonders of the Multiverse

You’ve begun studying the art of runecraft.

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 two runes of your choice from the Rune Spells table. Whenever you finish a long rest, you can mark one nonmagical weapon, armor, piece of clothing, or other object you touch with a rune you know. You temporarily learn one 1st-level spell based on the rune you inscribed, as specified in the Rune Spells table, and you know the spell until you finish a long rest, when the rune fades.

Rune Spells
Rune Spell
Death Ray of Sickness
Dragon Chromatic Orb
Enemy Disguise Self
Friend Speak with Animals
Journey Longstrider
King Command
Mountain Entangle
Sacred Sanctuary

While you are wearing or carrying the rune-marked object, you can cast the spell associated with the chosen rune once without using a spell slot or material components, and you can also cast the spell using any spell slots you have.

Your spellcasting ability for this feat is Intelligence, Wisdom, or Charisma (choose when you select this feat).

Each time you gain a level, you can replace one of the runes you know with a different one from the Rune Spells table.