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All other sources that grant "curse on hit" like glove corruptions, shaper/elder curse rings etc - all of them DO work with mines and traps. However this ring does not. Is this intended or is it an oversight? I wanted to use it in my build, but found out the sad truth - and it's already a statless lifeless unused unique.

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over 5 years ago - /u/Mark_GGG - Direct link

The difference is that this one is specifically using a curse skill that your character has - Mines only have one of your skills - the one they were made from. They can do on-hit effects that apply things, but they cannot trigger other skills (curse-on-hit from a specific curse skill is a special case of triggering), because they don't have those skills.