Your search for "Mirage Mirror 300" revealed the following:
Inkay - 068/103 - Common - Reverse Holo from Mega Evolution: Delta Reign, available at 401 Games Canada. Rarity: Common Finish: Reverse Holo Artist: kawayoo Card Text:[D] Knock Off (10)Discard a random card from your opponent's hand.
Mirage Mirror (M3C) from Modern Horizons 3 Commander, available at 401 Games Canada. Rarity: Rare Finish: Normal Artist: Craig J Spearing Card Text:2: Mirage Mirror becomes a copy of target artifact, creature, enchantment, or land until end of turn.