Sorcerer

Sorcerer: Metamagic

From 5th level, you know two metamagic options. You know three option at 10th level and four option at 17th level.

Whenever you finish a long rest, you can replace any metamagic option you know with another metamagic option.

Metamagic

Extended Spell

When you cast a spell that has a duration of 1 minute or longer, you can spend 1 sorcery point to double its duration, to a maximum duration of 24 hours. If the extended spell requires concentration, you have advantage on Constitution saving throws you make to maintain that concentration.

The extended spell ends when you finish a long rest.