With fetches you can fetch for the Shocklands. Even though you take 3 damage in total (if you decide for it to come in untapped) being an infect deck, and considering if you're up past turn 4 still you've lost, the damage you take initially isn't a bother. with a single fetch you can fetch either the
Overgrown tomb or the
Breeding Pool (as they're both each basic land type) depending on what you have in hand.