Wondrous Item, Very Rare (requires attunement)
While you wear these boots, you gain access to the Misty Step spell which may be used via this item a number of times equal to your Intelligence modifier.
Additionally, when you summon a demon that requires a charisma saving throw to wrest control from, they make that save with disadvantage, even if you do not know their real name. (as per Summon Greater Demon)