Advanced format ruling
Fairy's Hand Mirror
Card effect (current official text)When your opponent activates a Spell Card that targets exactly 1 monster (and no other cards) on the field: Target another card that would be an appropriate target; that Spell now targets the new target.
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.