Target 1 monster you control; reveal 1 Fusion Monster in your Extra Deck, and if you do, the targeted monster's name can be treated as the revealed Fusion Monster's, if used for a Fusion Summon this turn.
Biggest question is, does this use the TCG or OCG Ruling in Duel Links? In the OCG, you can use it for Contact Fusions (such as XYZ) however in the TCG, you can. It’s due to how it’s worded. TCG version says “if used for a Fusion Summon this turn” whereas the OCG version says “if used as a Fusion Material this turn”, that doesn’t specify Fusion Summon, so it works with Contact Fusions (as they’re not actually Fusion Summons) only in the OCG.