It's pretty useful. The Thunder Guards themselves are already quite powerful, capable of extreme rage, and, with the amplification of the Thunder Power, they might even be able to duel Luther one-on-one.
There are twelve Thunder Guards here. If each one has the strength of Luther, that's equivalent to twelve High-level Sword Saints, a formidable strength indeed.
After scolding the dwarves who were recklessly smashing things, Copper Hammer led everyone into the War God's Chessboard.
Upon entering the War God's Chessboard, Ange was immediately struck by a sense of familiarity.
"Doesn't it feels like a larger version of the Illusion Simulation Formation?" whispered Negris.
Indeed, it did. Ange bought several Simulated Magic Formations from Auburnli. One of them was kept inside the Temple of Rest, and you could play simply by reaching your hand in.