Retailers have been warned to brace themselves for a magical spell of selling following the launch of the eagerly anticipated Harry Potter Trading Card Game. Wizards of the Coast, a subsidiary of games giant Hasbro, predicts demand for the cards could even surpass that of its other bestselling kids' trading game, Pokémon, with its latest packs expected to fly out of shops faster than the schoolboy wizard can cast a spell. More than 250 million Pokémon cards have already been sold in Britain and the Potter version ­ boosted by the release of the first movie in November ­ should match that. Based on JK Rowling's first novel in the famous series ­ Harry Potter and the Philosopher's Stone ­ starter sets (rsp: £7.49) contain two 40-deck packs, damage counters', a rule book and a playmat. Booster packs containing 11 cards are £2.49. This week's much hyped launch in London gave a clear indication of how popular both formats are likely to be with a host of celebrities taking their children along to try them out and the cards gaining critical acclaim among their target audience. A spokeswoman for US based Wizards of the Coast said: "The sell into retailers has been extremely good. We expect that to continue." {{MARKETING - P&P }}