Entering Chaos (inspired by Gamma World)

So here is where I stand in my campaign.

My players have entered Chaos seeking the undead dragon who is going to ascend to godhood, or distroy reality trying.

Being that Chaos is raw paower, and force, its unfettered creation, and all sorts of weird, I was really looking for a mechanic to express this. We recently got Gamma World, and I was thinking that the whole Alpha Flux thingy coud accomplish this really well. At the begning of an encounter in Chaos they gain some sort of mutation or change, and same when they roll a 1.
The problem is that I don't think those cards will work for Epic level characters.
Can you guys offer any sugguestions on either how to mod those cards for players in Epic tier, or other ways I can create the feeling Chaos in their upcomming encounters.

-Amber

Consider doubling the number of damage dice for the attack powers and the damage bonuses/resistances on the utility mutations.

That should bring them up to epic tier.