When paused this glitch works constantly until the game is un-paused.
To use the camera trick, zoom your camera all the way in, go to the top left corner (other locations may work too), then zoom all the way out. Double click your hero portrait once you have zoomed out and now the camera is zoomed out. Don't have the cursor hit the edge of the map and don't click the arrow keys as those two actions will brake the glitch. To move your hero under this effect you can either right click on the map (without touching the map edge) or right click spots on the mini map.
A huge thanks to YouTube Channel MMMontageMusic for providing "Mr. Meizong - Breeze [House]"
Attribution: "Breeze (Original Mix)" to Mr. Meizong
/ breeze
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This track can be downloaded, shared, copied, distributed, transmitted, and used commercially. It is Creative Commons licensed.