Legendary Action

Being an adventurer long enough you start to learn a thing or two, and that experience didn't go to waste. You've learned the flow of combat, allowing you to take action when you feel it necessary. You gain the following benefits:

When a turn that isn't yours ends, you can use your reaction to do one of the following:

• Make a melee weapon attack against a creature or object within range.
• Cast a spell that's level is equal to or less than a third of your character level, rounded up. 
• Move to an unoccupied space within range of your movement speed.