Hello! I found this on Reddit and I'm very excited to start using it as I'm working on getting a Arcane/BitD campaign going soon. I hope you're also planning on making crews as well whenever you have time. If you have any interest in adding a map of Piltover/Zaun, I have been developing one in the style of BitD and I would be happy to share it with you.
In the meantime, I do have a question and a comment related to Hextech. My comment is maybe a bit nit-picky, but the Hex Cores described in your guide are actually Hextech Gemstones. The gemstones are the crystals that hold the arcane power (and are used in the weapons like Jinx's gun, Vi's gauntlets, etc.), but the Hexcore is the "adaptive rune matrix" which eventually evolved, became sentient, and basically fused with Viktor.
My question is about the use of the Hextech dice. If someone rolls a 2-5 on their Hextech dice, what does "No effect" entail? For example, if a PC is trying to Wreck something with Hextech gauntlets, and they rolled a 6 to Wreck but a 4 on their Hextech dice, would that mean the gauntlets were entirely unusable and the PC basically does nothing, or would it mean that they use the gauntlets but as if they aren't powered by Hextech at all (so still doing some damage, but not nearly as much as they would if they rolled a 6)?
I think it's really smart to limit the access to Hextech because it is so overpowered, and to have major consequences when players roll a miss. But the range for "No effect" seems a bit high to me? In the show, it seems like most people are able to use Hextech with a bit of training, especially after Jayce and Viktor refine the gemstones. Both of them had the goal to bring Hextech to the common people, which would mean that Hextech tools and weapons would have to be somewhat foolproof when used for what they were designed for. I think in my own games I will use a scale of 1-2: fail with serious consequences, 3-5: partial success (slightly miss a target, not use as much power as planned, get a slight injury, etc), and 6: full success. But I would be really interested in hearing your thought process with this, especially if you've been able to run a game already!
Sorry for the novel, and thank you so much for all your work on this!!