Finally got my copy of SotM today, and I've been playing like crazy (as you can see here: http://www.boardgamegeek.com/plays/thing/102652?userid=327824 ). And I'm really enjoying it, and I'm especially liking Ra and his combos right now. Flesh of the Sun God seems to open up so many wonderful possibilities...
First and foremost is the fact that together they allow characters with powerful self-damaging cards (including but not limited to Haka's Rampage, Tachyon's Breaking the Limit, and a few of Fanatic's cards) to now use the effects of those cards for free so long as this combo remains in play and Ra keeps using Flesh's power.
Alternatively, FotSG alone allows him to combo with Visionary's Twist the Ether. Play TtE on a villain card that isn't particularly heavy on minions, and you can pretty much lock them down with just those two cards. And considering how good Visionary is at deck manipulation, one card per deck shouldn't be hard at all to pull off. Granted, this is pretty useless against characters like Grand Warlord Voss or the Matriarch who flood the field with alternate targets and deal damage by overwhelming you with them.
And if you're playing on Insula Primalis, FotSG makes River of Lava nothing more than fuel for Scorched Earth and turns Volcanic Eruption into your best friend.Combine this with three Obsidian Fields, and the environment becomes more a friend than an enemy, and most of the dinosaurs aren't much of an issue (the eruption will take care of them soon enough anyways).
Questions, comments, and opposing points of view?
Oh, I certainly agree. Ra is practically damage personified. With no external buffs (eg Galvanise, Obsidian Field), he can give himself a total of +6 damage with the right cards out - he gets +1 from both the Staff and Imbued Fire, and +2 from each copy of Solar Flare (of which he has two). To keep Solar Flare in play he has to deal himself psychic damage. With Imbued Fire out, this is converted to fire damage. With Flesh of the Sun God, he's therefore immune to it. The most damage you could probably do in a turn with that setup would be Flame Spike (7 damage) allowing you to use two powers…you could use a Blazing Tornado (9 damage), or on the other and if you're against a villain with loads of Ongoings in play, Drawn to the Flame could be pretty damn epic since it hits all non-hero targets…ahh, he just has so many ways to hit stuff!
When my partner and I want a good fun, easy game, we take Ra, Legacy, and a random third hero against Akash'Bhuta in Insula Primalis. Ra gets a zillion damage buffs from himself, Legacy, and the environment. If he gets out even Flesh of the Sun God he can protect everyone whilst watching the volano destroy Akash'Bhuta, but even if that doesn't happen you tend to get a fair few environment cards out in such a fight (at least until a Disrupt the Field shows up) so Scorched Earth can be pretty nice :). Of course, it's not nice if Ra gets tagged by an Ensnaring Brambles, but hopefully everyone else can destroy it before Akash'Bhuta's next turn (or modify the hero hp totals appropriately) so they don't tag him again.
Flame Spike and two copies of Living Conflagration also gets Ra some decent card draw with damage to boot, as well, so hopefully you can get som eof the "power combo" set up fairly quickly :).
On the subject of Visionary's Twist the Ether, this would work well with Ra against someone like the Matriarch - play Twist on Lilian, make sure Ra has Flesh out and has used its power, then have someone nuke all the birdies (Haka with Rampage while he has Savage Mana out would be absolutely the best, even more so if Imbued Fire is in play at the time so that none of the heroes take damage!) and laugh as the Matriarch's psychic retalitation gets converted to fire damage :D.
Ra also works well with Absolute Zero, but shouldn't play Imbued Fire in this case as it means Ab'Zero wouldn't be able to heal himself since all his cold damage would be converted to fire.
I could go on…Ra is one of those heroes who, though sounding like a one-trick wonder (he burns stuff), is actually, in his own way, pretty versatile and bloody useful, especially with teamed with certain heroes (Legacy, the Adept…actually, who isn't made a whole lot better with the addition of those guys? ;)).
Well having Twist the Ether Played after Imbued Fire on AZ would still turn his attacks back to Cold. After Getting the +1 boost from Imbued Fire I believe??
It could change it to cold, but he wouldn't gain a +1 from Imbued Fire as that only increases Fire damage, and AZ would be dealing cold.
If bonus damage is given to a specific type of damage it has to be that type of damage at the end when it is dealt to gain the bonus, not just that it was that type at some point along the 'damage chain'.
The same goes for Wraith and her Micro-Targeting Computer - this only boosts projectile damage so if something like Imbued Fire is out (converting all her damage to fire), she won't get the boost. Well, she'll get the +1 from Imbued Fire of course...but nothing from the MTC.
So basically damage type conversion calculated first. Then damage boosts.
Makes perfect sense.
Yeah, which is why it's cool if Ab'Zero (versus Plague Rat) has been Infected and Visionary has played Twist on him and he has his NPCU out - free hesling at the start of every turn! 
Made even better, of course, if he has his Focused Apertures out. I think the Cryo Chamber works there too, since I recall it adds to his cold damage received. Actually it doesn't matter if it adds to his cold damage dealt, since he's hitting himself anyway ;). Anyway, that was a really fun game and the only reason Ab'Zero wasn't on full health at the end of it was 'cause he hit himself with some fire damage on his final turn in order to finish off Rat with the resultant cold damage :D.