[OCG] Fusion Tag

A new Spell Card from Shining Victories

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融合識別 Fyuujyon Tagu (Fusion Tag)
Normal Spell Card
(1) Target 1 monster you control; reveal 1 Fusion Monster from your Extra Deck to your opponent. During this turn, if you use the target monster as a Fusion Material, you can use it as a Fusion Material with the same name as the revealed card.

Basically, it lets you target, say.

Clayman, and treat it as Elemental HERO Flame Wingman
or
Moon-Light Blue Cat and treat it as Moon-Light Panther Dancer

Source