Legacy sideboard

[Jake, Fart Sculptor]

So I've heard of side boarding 4 {leyline of the void} in case you come up against dredge, and just mulligan until its in your open hand, I just realized that you could do the same with {leyline of sanctity} for almost all legacy combos. That's just wrong.

[BlackJester]

What wrong with that?

[loop-s-pool]

What wrong with that?

I'm assuming because it shoots decks down, which I don't really think it is. 8/15 cards in your sideboard to handle specific combos isn't very good. What happens when you run up against your average Maverick or Tempo deck?

[Jake, Fart Sculptor]

This would be the sideboard for your maverick and tempo decks.