Is it so hard to read a guide or watch a tutorial video?
Look up the definition of “know”.
English
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Some might not learn that way. As any educator can tell you, some learn by hearing the instructions, some learn by seeing them, and some learn by doing. It's a matter of providing the right approach to the learning process. If they can learn the raid best by jumping in with both feet and experiencing it first-hand, then the tools are there to let them do it. If they learn by watching videos, then I'd recommend Datto's or Esoterickk's videos on the raid, while keeping in mind that IMO Esoterickk's videos tend to be huge flexes on the entire D2 community based solely on the fact that they solo GM Nightfalls, 1580 Lost Sectors, and entire raids.