http://www.wizards.com/Magic/Magazine/Article.aspx?x=mtg/daily/ftl/177
{Havengul Lich} + Any creature with an ability. Seriously.
Okay, back to reality. When I first saw this card, I saw an enormous gold-plated diamond. But then as I thought about it, I was so overwhelmed that I don't even know where to begin. If someone hands you a diamond the size of your fist, what would you do with it?
I'm posting this up now, because Noel has already said so much and I want to come up with something specific for the DC. I'll be back in a jiffy, just let me mull for a bit.
BRB
Okay, first thing that catches my eye in Standard U/B at least (I'll start there so I don't drown in a sea of searching and mulling) is another fav of mine:
{Civilized Scholar} + {Havengul Lich}
Reanimate the Scholar and T,U,T,U,T,U the lich to dump every creature in your deck into the bin. We've seen this before, but NOW we can CAST THEM TOO!!!
MWAWAWMAMAMWAMWAMA!!
Second, with all this "dumpster diving", it's going to take a lot of mana. {Grand Architect}?
Noel already mentioned {Grimgrin, Corpse-born}, but I can't NOT mention it too. Especially when I can sac a dude to untap the Lich. Hmmm I think there's something there....
I'm thinking that {life's finale} and any creature/equipment with haste
I've Got It!!!
{Havengul Lich} + {Grimgrin, Corpse-born} + {Grand Architect}/{Palladium Myr} + {Pentavus} = Infinite colorless mana & infinite creatures coming and going!
Add {Etherium Sculpter} and {Perilous Myr} for infinite damage. {Grave Pact} to make them sac their team.
{Havengul Lich} + {Grimgrin, Corpse-born} + {Bloodline Keeper} = Infinite +1/+1 counters on the Lich.
Edit: Ow man, I didn't see that he beat me to that one. ;_;
Adding {Heartless Summoning} to the mix:
{Epochrasite} :D
{Perilous Myr} (again)
{Myr Retriever}
{Arcbound Ravager}
{Steel Overseer}
I feel like I'm barely scratching the surface of this card's potential...
I feel like {Phyrexian Altar} should be mentioned so that you have access to any color mana to cast your opponent's guys too.
{Havengul Lich} + {Charmed Pendant} = 1:{Zoologist}! ðŸ˜