Advanced format ruling
Mirage Knight
Card effect (current official text)Cannot be Normal Summoned/Set. Must be Special Summoned by "Dark Flare Knight" and cannot be Special Summoned by other ways. During damage calculation only, this card gains ATK equal to the original ATK of the opponent's monster it is battling. During the End Phase of a turn this card attacked or was attacked: Banish this card.
Current rulings for this card are maintained by Konami.
Rulings data courtesy of Format Library — formatlibrary.com. Spotted an inaccuracy? Flag it in the Advanced forum — sourced change requests get reviewed.