Crystal Seer

Crystal seers are mindmages who have unshakable trust in their considderable skills of mindmagic and skills of Precognition. They disregard anny and all stealth and openly face anyone just to wipe their mind to make them forget they ever saw them. They use bright blue crystals to amplify their powers and make predictions. They mostly work for the Dimir. However some independant Seers still roam dark alleys and the undercity in Ravnica.

Refferences:

https://scryfall.com/card/gpt/23/crystal-seer