Using shift + right click function of illumination wand (to turn a block transparent like the book says) makes the chunk crash your game.
Environment: Dedicated server, moving into chunk with "transparent" block caused a client crash, server unaffected
MC: 1.16.4
AS: 1.13.1
Modpack: Valhelsia 3.1.0 pre7.
crash-2020-12-02_11.22.17-client.txt
crash-2020-12-02_11.34.21-client.txt
crash-2020-12-02_11.43.22-client.txt
crash-2020-12-02_11.16.58-client.txt

FYI: For anyone who's currently stuck crashing with this, installing optifine should let you load back in to remove the transparent block.