Your dexterity score improves by two and your intelligence score improved by one. 

You gain expertise in one skill of your choice. 

As an action, you can try to replicate an attack, feature/ability, or spell that a creature you can see has used since your last turn. Make an Intelligence check. The DC of the check equals 10 +the difference in levels between you and the the creature (or as determined by the DM) On a success, you replicate it. If it is an attack, you must have the same type of weapon used in the original. If it is an ability, you successfully use it. If it is a spell, you cast it as if you knew it, using intelligence as your spellcasting ability. You are considered proficient in any check, attack, spell attack, or otherwise that you make as a result of using this ability.

Once you have used this ability, you can’t use it again until you complete a long rest.