Flash of Heraldry

Quick-Play Spell Card

Target any number of face-up monsters your opponent controls; those monsters' names become "Unknown". During your End Phase, if you control a Psychic Xyz Monster and this card is in your GY: You can Set this card, but banish it when it leaves the field. You can only use this effect of "Flash of Heraldry" once per turn.

Rulings – Yugipedia

Printings:

Alliance Insight: ALIN-EN056 (Super Rare) - 2025-05-01

Prices:

Cardmarket: 0.11 €
TCGplayer: $ 0.08