Before I get going, I just want to say this: "Orgg" is a legal creature type. That is awesome.
I've really tried to make this card work in my mind, but I don't think losing all but 1 life is worth a 6/6 trampler for 5. I'm well aware of cards like Near-Death Experience and Worship, but I think it's still too much of a gamble to place it all on a slightly-cheaper-than-normal creature. If this had haste, I could definitely see this appeal in this card as a finisher in a speedy red deck. But, as it is, it needs a lot of support to make it worthwhile. I'm not saying there's no way to use it; I'm saying that it's a huge risk to use it.
Pros: 6/6 trampler for 5
Cons: Massive risk in using it