This suspicious environment is like other photo combination. You need to prepare few images which contain your elements e.g. witch image and house. Skills for cut and paste, color and brightness adjustment will be showed in this tutorial for your reference.
日本語: まだ 日本語 版の翻訳はありません。英語で見る — showing the original English article below.
Suspicious Environment for a Wizard
日本語
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専門家のガイド、レビュー、ヒントを受信箱にお届けします。スパムなし、いつでも解除可能。