Rootborn Defenses in sideboard. Celestial Flare and Renounce the Guilds sideboard as well. You can't take on a Stormbreath or Blood Baron.

I also recommend 1-2 Nykthos, Shrine to Nyx .

Consider Spear of Heliod main board.

Lastly, think about Murder Investigation .

I like Celestial Flare and Renounce the Guilds for the sideboard. And I like the possibility of Murder Investigation pairing up with Spear of Heliod . But to truly make those effective I would need an Elspeth and/or some Phantom General 's in there. . . possibly a start for another deck. . . .

I see Rootborn Defenses as a Brave the Elements that costs more. I know its not quite the same effect but it would do almost the same thing in this deck. And Nykthos, Shrine to Nyx , would just be diluting my mana base. The extra ability is nice, but nothing in this deck costs more than 3 (bestow 4), so I don't see an advantage to it.

Thanks for the suggestions! If you have any more, let me know.

Rootborn Defenses is the only card that can save you from Supreme Verdict and an overloaded Mizzium Mortars . Brave the Elements doesn't help you there.

The reason I suggested Murder Investigation is because you will often extend your board and have 1-2 enchantments on any given creature. Black and red have so many burn spells that would easily 3 for 1 or maybe 4 for 1 your creature with enchantments. At least Murder Investigation let's you keep bodies on the battleground after they die.

This decks weakness is removal... Need something to protect from all the above.

You are most definitely correct about removal being a weakness. But as I see it, I am more concerned about 'target player sacrifices. . .' type cards. And the glorious thing about this deck is the fact that I will still have bodies on the ground after a removal, even a mass removal like Supreme Verdict . The bestow mechanic is freakin' sweet. Because of the removal aspect though, I may need to sideboard some different things. I may have to add in some Auramancer s or some Griffin Dreamfinder s. Get a Gift of Immortality on one of those and make it the target of all the 'target player sacrifices. . . ' cards and the end effect will me being able to grab an enchantment creature or aura from the graveyard. I have yet to bring this to a FNM to test it IRL, I will give an update when that happens.

Now I'm going to playtest your mono-white :D

I run a simpler version - no hopeful eidolon (bestow cost a little high+lifelink not super useful) and no chosen by heliod. I kinda like the sideboard options with heliod and fieldslayer etc to turn it into a more versatile midrangey deck though. Check out mine: http://tappedout.net/mtg-decks/white-aura-weenies/