这还用问裁判啊……在双方都让过优先权后一个阶段或步奏才会结束。也就是说就算让过战斗阶段也会有，只是平时都是习惯性的略过确认每一次的优先权转换而已。

During combat, you can cast instants before attacks are declared, after attacks are declared, before blockers are declared and after blockers are declared. After that, you have to wait until combat damage is calculated to cast another spell or activate another ability.

不宣也有的。 就像upkeep阶段一样

我也认为这张牌设计存在漏洞

这张牌就是个战术地雷阵，对手不踩过来就引爆会毫无价值，所以使用上并没有那麼多有的没的