Edit: Having read the semifinal and final reports turns out he never played a Skeletal Wurm in either match :P
Florian Koch 2-0'ed every match in Top 8 with 2 Skeletal Wurm in his maindeck and Lavafume Invoker, Lagac Lizard, Virulent Swipe, Wrap in Flames, Vent Sentinel and Zof Shade in his sideboard.
Of course he had triple Vendetta so maybe it was wrong but it didn't matter. But I found that curious.
Also, Bloodrite Invoker over Lavafume Invoker?
I guess he had bad creatures and good removal and decided to use them as stand-in Eldrazi in a live-to-make-a-giant-thing plan.