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'''Tactical Evolution''' (TAEV) is the 24th booster pack released in the Yu-Gi-Oh! Trading Card Game. It is the largest GX generation booster, with 90 cards. It introduces a new category of monster like Toons, Unions and Spirits — [[Gemini Monster Cards|Gemini Monsters]], as well as a new mechanic: [[Second Summon]]. The ratio of [[Ultra Rare]] cards gets increaseddecreased, a new rarity above [[Ultimate Rare]] is introduced, called "[[Holographic Rare]]" in the OCG and "[[Ghost Rare]]". It also releases [[Jesse Anderson]]'s best monster "[[Rainbow Dragon]]". Anime fans will be confident with the content. There is also appearances of the "[[Venom]]" cards used by [[Professor Viper]]. There is also more [[Elemental Hero]] monsters and supports, New [[Neo-Spacians]] like the Chrysalis monsters. This set also features improvements to the long-neglected [[Reptile]] Type, with the aforementioned "Venom" cards and new [[Alien]] supports.