Invincibilty

This. Also, every "exile all" effect, like for example Apocalypse, Perilous Vault or Final Judgment.

I only mentioned Mutilate as it's a big card in my Heartless Summoning deck that I've been playing a lot recently. Massacre Wurm is another big one in the deck. It wipes out small creatures and combos well with Mutilate :P

Do you know of any cards that make it impossible to affect creatures you control?

The thing is, in Magic, there's always a way to get around what the opponent put up. For most global effects, something that grants indestructible (like Avacyn, Angel of Hope) should keep your stuff alive, but that still doesn't help against sacrifice; exile; and -X/-X. You seem to have Sigarda, Host of Herons to help against sacrifice and Privileged Position to help against targeting (which most exile effects are). The most played global hate cards say 'destroy all creatures" because the "exile all" often costs more mana, so you should be fine once Avacyn is out.

I tend to play with lesser used cards to fit in those little gaps people forget to defend, so don't worry too much about Mutilate, it's not played often enough to hinder this deck too much.

What if I added an infinite sorcery loop of Silence?

Added Akroma's Memorial. Only cards that can beat this are Final Judgement or Perilous Vault. Do you know of anything that gives stuff you control protection from colorless and/or white?

FYI, protection doesn't protect from global effects (unless it's global damage, and Avacyn already covers that), as protection can only stop being targeted by, dealt damage by, and being blocked by sources of whatever you have protection from. [So, Mutilate can still kill stuff with protection from black]

So, you don't really need protection in this type of deck. You already cover the prevention of targeting with hexproof and protection from damage with indestructible.

Like I said, there's always a way to get around something in Magic.

Oh, and yes, a well timed loop of Silence does work (*cough*Isochron Scepter*cocough*), but that's a build for a different type of deck.

I think it should be impossible now. Keep trying.

Well, Control could still prevent everything. Interrupts are a thing. And bounce spells like Evacuation, Devastation Tide, Inundate, Rebuild and Whelming Wave for example.

There's always the possibilty to prevent attacks, with Safety Sphere, Norn's Annex and such.

Land Destruction sabotages you as well if you can't get out Darksteel Forge and Mycosynth Lattice in time. Actually, you have to get out EVERYTHING in time to be kind of secure. Fast Aggro is probably still gonna best this deck, as well.

Also, "exile all" effects still work. Mutilate still works. "Tap all" works to prevent attacking/blocking.

Well, they can't actually play any of that once you get the combo out. The point of this deck is to discuss the combo, not actually be playable.

What combo specifically?

All of the cards in the list. They should make it impossible to win.

Just check the deck description, man.

If it isn't obvious enough, this isn't made for the deck, it's made for the combo. I couldn't care less how the deck played.

Kinda defeats the purpose though, right? If it isn't viable in play. Interesting puzzle though to figure stuff out that circumvents your protection.

True, it does. I'm asking if it's possible, not if it would be legitimately playable in a deck. Obviously, with so many cards needed to pull this off, your opponent would counter your spells unless you used cards such as Black Lotus or Dark Ritual or Lotus Petal on your first turn.