User blog comment:BgHiro87/"Hundred Demons lurking in the darkness, destroy and rampage! Devour the world! Dark Luminize! Hundred Thunder Demons!"/@comment-25004901-20150801153548

Ok, so I do not play Hundred Demons, but my brother does, and I build his deck, so I'll try to help. First, lets try to shorten Tennomimakari to 0-2 copies (3 if you just feel it should be there). Try to get one more Akishoki for 3 copies, and 3 copies of reinforced since you have more draw spells. Ryubokushihai should be at 3-4 copies, as to force your opponent to call more monsters and add more pluses to you. 2-3 Harpy, since this deck has gauge flow like water, combos like Harpy, Narukami, and Starved leads to massive impact or next turn combos. Include some more size 0s since you're trying to focus on Thunder Mine Yami, as to get more attacks. Then include some more of the weapons that can attack around the center, since it can lead to more combos when you don't have Narukami or the proper monsters. Overall, though, this deck is good, just needs a tune up on some things. That's just my thought on it though XD. Hope this helps.