Multi-Caster (5e Feat)
From D&D Wiki
Prerequisites: The ability to cast at least one spell
You have greater control over spells and the power with which they can be cast. You gain the following benefits:
- If you've already cast a spell a 2nd level or higher during your turn, you may cast another spell of a level equal to half the first spell's level, rounded down. You must still use the required action or bonus action for each spell. You cannot cast a third spell in the same turn.
- You gain an additional reaction each round that may only be used to cast a spell with a casting time of 1 reaction.