If you celebrate the holiday of Christmas you can appreciate wanting to spread joy even to those who would try to bring you down.
Bards magical secrets at higher level give customisation options to die for. Here is one such Specialist Snowflake.
At lower levels a bard takes the warlocks Armor of Agathys. (5 temp hits and if hit in melee and even 1 hit remains the attacker takes 5 cold damage) It lasts an hour without concentration
At 18th level magical inspiration grants you the Invulnerability spell, making you immune to all damage for 10 minutes. (expensive component though)
Cast AoA at 8th level, then Invulnerability and prance, often with eyes closed to give opponents advantage, around hostiles. Every hit deals 40 damage to them and 0 to you. How many encounters can you dance ballet through in 10 minutes? Prestidigitation for harmless sounds of the Nutcracker waltz and you are ready to 'Mock and Troll'.