Let enemies 'steal' the Thresh lantern and travel to Thresh
I think it would be cool to add a bit more counter-play to Thresh's lantern by making it so that enemies could click on and 'steal' it, travelling to Thresh. That would make it quite a bit more interesting as he wouldn't be able to use it to thoughtlessly bail everyone out all the time.
Although I agree. Why not let the enemy damage the lantern twice to "destroy" it.

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otp
"You can't milk those"