Pathfinder 2e Action / Feat: Magnum Opus

Description You have tuned your spellcasting to the highest caliber.
Applications Add two common 10th-level occult spells to your repertoire. You gain a single 10th-level spell slot you can use to cast one of those two spells using bard spellcasting. You don’t gain more 10th-level spells as you level up, unlike other spell slots, and you can’t use 10th-level slots with abilities that give you more spell slots or that let you cast spells without expending spell slots.