If you dont, you may put a land card from your hand onto the battlefield. If you can plot a card, cast something from your graveyard, from exile, from someone elses hand or directly from your deck, you can put something of your choice into play from your hand
Support it with protection spells and grant it trample to clear your path to a victory
The amount of life you lose is determined by the mana value of the card in your graveyard, not the creature once it's on the battlefield
Blocking opponents is one method, but it might not necessarily result in a dead Vampire
Red XIII, Proud Warrior* Everyones favorite dog/cat/mutant/beast from Final Fantasy 7 s Limit Break Commander deck presents an acceptable body, while helping modified creatures you have get through and even helps recur an aura or equipment
if you play your land drop in your first main phase, youll go to the extra combat step before your regular combat step, leaving your creatures tapped since they dont untap at the beginning of your normal combat step