That sort of power is tough to argue with, which is why Mithril Coat has become almost a must-have card for commander decks
Osgood, Operation Double Osgood, Operation Double gets a nod for making two creatures with relevant mana abilities for artifact decks and being able to investigate via the paradox ability word
snot This card came about as we were trying to find ways to create cards that worked together
With many things going digital, its possible to find these at antique stores or other such places
(It has menace and cant block.) Whenever this creature deals combat damage to a player, you draw a card and you lose 1 life
Bruna, Light of Alabaster Bruna, Light of Alabaster brings aura synergies to the table, with the holy grail probably being Eldrazi Conscription, the Colossus Hammer of auras