Killer Exodia Combo (with IOC cards)
This might be a little too wordy but it would greatly enlighten your duelin' knowledge.
so sit back, read and educate yourself. 


There was one card in the IOC expansion set that can give a killer boost to exodia decks, "Manticore of Darkness". Just in case you don't know what it is ........

MANTICORE OF DARKNESS
Fire/Animal Warrior/6/2300/1000
You can activate this effect during the End Phase of a turn in
which this card went to the Cemetery.  Put 1 Beast, Beast
Warrior or Winged Beast-Type Monster card from your hand or from your
Field in the Cemetery to Special Summon this card from the
Cemetery.

Ok what's so special about this card. It's a beast so will it work better in a beast deck? Well, actually with the right cards, you can get all 5 pieces of exodia in one turn.
Think of this scenario, lets say you only have a manticore in your hand, your life points are down to 2000, all your exodia pieces are in your deck and your opponent has both chaos monsters on the field. It's your turn to draw, if you don't top deck you'll lose next turn. You draw and get a graceful charity and use it to get another manticore, monster reborn and card of safe return. You discard your manticore and monster reborn and you have just won the game. How you may ask, well that's very simple. 

You see, manticore can only be special summoned from the graveyard if there's a beast, beast warrior or winged beast in your hand or field. Manticore is also a beast itself. Now going back to the scenario, a manticore was in your hand and another one in the graveyard. At the end phase of your turn, special summon manticore by discarding manticore from your hand. Get back the manticore you just discarded by destroying your manticore on the field. Destroy the manticore that just came out to reborn the other manticore you discarded. And do it again and again and again and again and again.........................................................................................................................  Until you get bored. This is a circle of special summoning manticore. Now this is where card of safe return comes in. Card of safe return allows you to draw a card whenever something is special summoned from your graveyard.  You know what this means. Unlimited draws!!!!!!!!!!!!!!!!. This is just another elma, gearfreed and magicians library combo but this one is faster, depending on what kind of exodia deck you play.

Great Combo
You start off the duel and you have Monster Reborn, Card of Safe return and painful choice.
play painful choice to get 2 manticores and 3 magic or trap cards. Even if manticore is not chosen, play monster reborn to get one out. Then play card of safe return, and you get to draw your deck. If it's an exodia deck, you'll have all 5 pieces. This spells W I N.