I've come up with a great combo that has won me many games, early huge creatures like really early creatures. Here are the cards needed.
Life/Death
 
Life G                   Death 1B
Sorcery                  Sorcery
Apocolypse               Apocolypse
Until end of turn, all   Return target creature
lands you control are    from your graveyard to
1/1 creatures that are   play. You loose life
still lands.             equal to its converted
                         mana cost.
 
Dark Ritual B
Instant
Meradian Masques
Add BBB to your mana pool
 
Skull Fracture B
Sorcery
Odyssey
Target player discards a card from his or her hand.
Flash-Back 3B
 
     The combo is quite hard 2 get but second or even first turn can be devistating. The combo goes. First turn play a swamp, tap 1 for dark ritual, then producing 3 use 1 of the 3 to use skull fracture on your self discarding my favorite a Serra Angel or bigger hitter. Then use the remaning 2 to use death returning the Serra Angel or other creature from your grave yard directly to play. Sure you loose life but with a first or second turn creature your opponent must deal with its worth it. It can also be used in Type II but no ritual but still begining able to pull it off.
 
If you have any comments remarks send them to Richiema@epals.com thanx.