Send one of your knights away on quest. After 5 of your turns it returns to a random empty square in your half as a Grail Knight, permanently able to also step one square in any direction.
You draft Grail Quest in Buff mode. Free action: you choose when to use it, and it resolves without costing your turn.
As a pieces card, it summons, revives, promotes, or converts a piece.
“He left with a horse and returned with a cup and opinions.”
Affects your knights.