关键字是adventure
An adventurer card is a creature card in every zone except the stack, as well as while on the stack if not cast as an Adventure. Ignore its alternative characteristics in those cases. For example, while it’s in your graveyard, Giant Killer is a white creature card whose converted mana cost is 1. It can’t be the target of the triggered ability of Mystic Sanctuary.

实在不觉得这是什么“全网都搜不到”的东西

On alert是牌名，就是中文卡图里的“警报戒备”你把它当成关键字查肯定一头雾水

起码在最新卡包之前万智牌还是有简中的，搜英文原名可以找到中文版，查卡一般用小程序mtgso，app旅法师营地，外网MTG goldfish，scryfall等

建议下次耐心问，感觉好像来引战钓鱼的

上mtgso（微信小程序）去查，名字类别介绍都可以

搞不定中文，英文可以去scryfall查，贴吧就有引导。全网查不到，ε=(´ο｀*)))唉