Sapphiric Sight (5e Feat)
From D&D Wiki
Prerequisites: You must be a Sapphire of the Gem race.
You have mastered your ability to see into the near future, and can predict the most likely outcome of events. You may use this trait to gain advantage on a skill check or attack roll, or to impose disadvantage on an attack roll targeting only you. This may not be used on skill saves. You may use this trait three times and regain all uses on a long rest.