American Express is reportedly teaming up with League of Legends developer Riot Games to release a series of prepaid debit cards that will earn cardholders in-game currency when used for everyday purchases.

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The New York Times reports that the cards will be properly unveiled on Wednesday, and will earn anyone who uses them Riot Points; the currency purchased with real world money and used in League of Legends to buy new champions, skins and boosts.Users will receive 1,000 points when they first sign up for the card and an additional 1,000 once they've loaded $20 onto it. More points will be earned for the first ten purchases made with the card, with 10,000 points given when it's linked to a direct deposit account. Further points are then earned with every dollar spent.It's worth noting this is a pre-paid bank card with no activation fees or credit checks, rather than a credit card. So you top it up with cash and then use it like a normal debit card.Videos explaining how the cards work are set to go live on Wednesday along with banner ads. Seeing as League of Legends has over 32 million active players worldwide at the last count, it seems like this could be a pretty smart deal for both companies.What do you reckon, could this be an incentive to get an AmEx debit card or is it unfairly offering otherwise-costly Riot Points to individuals who get one? Let us know your thoughts in the comments.

Luke Karmali is IGN's UK Junior Editor. You too can revel in mediocrity by following him on IGN and on Twitter