Originally Posted by
Shagstaman
I know this was directed at Julian, but my best advice is to a. know your enemy and what matters in the matchup and b. be fluid when sideboarding.
I often bring in 7-8 cards that "could be good" then take out the same number of cards which I feel are the least impactful, some of which may be the exact same sb cards I just put in.
For example, vs the new 4-color control decks-- I'd side in 4 decay, 1 cabal therapy, 1 progenitus, 1 thoughtseize, and sylvan library... then when I go through my deck I may determine that the 4th decay is worse than cutting another dude...and not find room for the thoughtseize... so my final board would be -2 heritage, -1 rec sage, -1 q.ranger, -1 nettle, -1 hoof and +3 decay, +1 cabal, +1 prog, +1 library. The idea is to know what effects are the best and go toward those...it takes some experience and knowledge of other peoples sb plans, but this skill is invaluable.
but if you're looking for a TL:DR sb guide, they are out there--just google it or ask someone on reddit (I think this is bad, but I understand if you are still new to the deck)