This uses a funny quirk of the save/load mechanic, in which several things are saved by tile rather than mid-action. This allows some odd tricks like monster stacking and, more pertinently, time travel.
Have fun!
(There's also a chance this gets patched at some point, but I feel like it'd be an unnecessarily large overhaul of the saving/loading mechanics as no normal level should break from this 
)(Preview~)
