“X”标记指的是白金！ is obtained from 破烂的地图 item, which you have a chance to get from any Platinum Ore node.
It's a part of 库尔提拉斯采矿 quest line to obtain 采矿技巧：白金矿脉（等级 3）.
You can use 附魔手套 - 库尔提拉斯采矿 to speed up ore gathering.
To complete the quest bring 破烂的地图 to 大副烬索 in Anyport Drustvar.
For TomTom users:
/way Drustvar 19.81 44.59 First Mate Cinderfuse Anyport

I was 145 when I got but could not open/accept it until I was 150 mining.

小知识

屏幕截图

视频

破烂的地图

物品等级：1
拾取后绑定
本物品开启一项任务

"描绘得非常细致的德鲁斯瓦的地图，西部有人画了个叉。"

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