A Leecher misting typically uses their ability to wipe another Allomancer of their metal reserves, and the Coppermind confirms that this also works for Breath and Stormlight, while also preventing a Shardbearer from summoning their Shardblade. Ever since I saw this line from the New Ascendancy broadsheet (from Bands of Mourning),
I wondered: "Would this same thing work on metalminds?" I think it would, since it works on other, more distantly related forms of Investiture, but it might not.