Memory theif

You gain the following benefits: • Whenever you successfully engulf a creature, you can use a bonus action to use your Read Memories trait against the creature for as long as it is engulfed by you. • When you successfully read the mind of a creature you have engulfed, you can steal some of its memories and leave creature’s memories drained for one minute. A creature that has its memories drained must whenever it makes an attack roll, saving throw, or skill check, roll a d4 and subtract the number rolled from the attack roll, saving throw, or skill check. The memory drained creature makes a Wisdom saving throw at the end of each of its turns, ending the effect on a success. • You can use your Read Memories trait one additional time before you have to take a short or long rest to use it again. Once a creature successfully saves against this trait it becomes immune to it for 1 hour