Puzzle #696 - Overlooked (Hotaru Beam)

When I was assessing my puzzle backlog for this archive dump, I found that I had an extremely strong milestone puzzle for #700. However, I only had enough puzzles to get to 699. So I asked the Witness randomizer community for a puzzle type to make, and the exceedingly more likely to be sharing the same brain cell as me Exempt-Medic suggested Hotaru Beam. This was an excellent choice, and even moreso considering I somehow had never made one before this!

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