Without getting into too many details, this basically makes it more likely youll have an opening hand with an appropriate land-to-spell ratio and makes it less likely youll have the extreme one-landers or six-landers
Token Production + Support This decks primary source of sacrifice fodder is Vampire tokens, so lets go over some token producers and a handful of support cards that make them stronger
Read more If you want to read up on the topic as a introduction, you can read this (older) but interesting article by wizards them self can be found here
If you counter a problematic permanent before it enters the battlefield, it ends up in the graveyard same as if it had entered the battlefield and you removed it
Counterspell (Ice Age/Alliances, Tempest/Stronghold/Exodus, Masques/Nemesis/Prophecy) Counterspells are decent in limited, but by no means the be-all, end-all of the universe