Jsk College of Mimicry

Mimic Magic
At 3rd level, you gain the ability to copy the spells of other spellcasters. When a creature that you can see casts a spell you can use your reaction to make a Charisma (Performance) check against a DC equal to 10 + the spell's level. On a successful check, you can expend one Inspiration Die to add the spell to your list of prepared spells for the day. This spell does not count toward the maximum number of spells that you can prepare each day. The spell counts as a Bard spell for you, and you can use your Bard spell slots to cast it. You lose the spell when you finish a long rest, or when you replicate another spell..

Superior Mimic Magic
At 6th level, you can replicate a second spell without losing the first one. The maximum number of spells you can have replicated at once becomes two, and replicating a new one when you already have two spells causes you to lose one of the previous ones. Both of the replicated spells are lost when you finish a long rest.

Instant Mimic Magic
At 10th level, when you use your Mimic Magic feature and you are successful on your Charisma (Performance) check, you can also choose to immediately cast the spell that you have replicated as part of your reaction. When you cast a spell using this feature, it must be cast at the same spell level as the creature that originally cast the spell, and you must have a spell slot to cast the spell.