Change color effects
Set toughness effects
Deathtouch/Unblockable for Oros
Extra attack steps
All the creatures in the deck are white, so they don't get hosed
This deck requires multiple cards to interact in order to win, so I took the (unusual for me!) step of adding in a bunch of tutors.
Click here for a text version of this decklist
Click here for my EDH Commander decks