Elegy of Mystery

 if you or any creatures who can hear you make a performance make a Deception, Insight, or Investigation check, They may add your Charisma modifier to that check. (This adds your charisma modifier twice to your own Deception checks)

Bard Song. - This Spell may be cast at its lowest level when a bard would use their song of rest, also they require a performance to cast, if your DM requires a check the DC is equal to 10 + the spell's level.