Demigod of Revenge

The Force of Will example doesn't work. Demigod triggers upon being played, not resolving, so you're still left facing down 15 power worth of creatures on turn 2; Not a position I'm keen to be in. Demigod is awesome.

Rammstein, can you give me an example of a turn 2 kill combo that can't be stopped by a well-timed FOW or Daze?
Nah. The basic idea of your statement is that combos are bad because they can be countered. I think you still have more to learn about this game.

I figured out a way to shave a turn off of my previous scenario. I have yet to get this lucky, but I have a deck it is possible with... T1: Swamp, Dark Rit, Buried Alive to put three Demigods in Graveyard. T2: Swamp, Ornithopter, Culling the Weak, Play fourth Demigod from your hand, which brings the other three into play, fly in for 20 on turn 2.. I think that's more than fast enough.

Combine it with Fists of the Demigod (duh) and kick butt :D

Erata is "cast." Meaning you must pay the casting cost of the creature in order to trigger the graveyard recursion.
Still a good card though.

If this creature had: "When this creature comes into play, return all cards named Demigod of Revenge from your graveyard to play" then I would give this creature 5 stars.

Your turn two win has a serious flaw. If your opponent has a Force of Will or Daze in hand, then they will counter your 4th Demigod of Revenge. If your deck is based off of this card, then your deck does nothing.

And since you know you cannot see yourself,
so well as by reflection, I, your glass,
will modestly discover to yourself,
that of yourself which you yet know not of.

If you can ramp up to him he is pretty fun. Even if the first one gets countered, a second demigod will get at least 1 demigod into play. Fun card, competitive? We will have to wait and see.