Original list: http://www.mtgtop8.com/event?e=3807&d=222679

The goal is to transform the original list into something that can fight Rakdos aggro/zombies.

Silklash Spider: Huge butt that can block Thundermaw Hellkite. Just about the only thing that can do so when Thundermaw is played without dying. The ability is also potentially relevant, although it can kill all my spirit tokens too.

Druid's Deliverance/Fog: I think Fog is better. I only have to leave one mana up, and I'm not sure how relevant populate is for me. Need to test.

Golgari Charm: For control matchups relying on Supreme Verdict. Regenerating all creatures is huge.

** Sideboard Plan **
Rakdos Aggro
+1 Sever the Bloodline
+2 Ultimate Price
+3 Centaur Healer
+2 Golgari Charm (For Bonfire)
-3 Borderland Ranger
-1 Craterhoof Behemoth
-1 Garruk Relentless
-3 ???

Hoof There It Is (http://www.starcitygames.com/article/25257_Video-Hoof-There-It-Is-In-Standard.html)
The big problem is that their sideboard is transformational into straight-up ramp beatdown.
+2 Druid's Deliverance
+2 Nevermore
+1 Intrepid Hero
-1 Sever the Bloodline
-3 ??? (Planeswalkers? Hoof has ridiculous ramp and will probably be faster than us.)

UW Flash
-1 Craterhoof Behemoth (if counterspells)