(Wither Rose) Creeping Blight

I have an idea. You just defeated the Wither, and it left Wither Roses (that are already planted) around, then the Wither Rose creates a blight that spreads around it, say every 5 minutes, creating an area that induces the Wither Status Effect on the X and Z coordinate (maybe up to 50 to 100 blocks from the rose), and up to 3 blocks on the Y coordinate. Trees affected by the blight becomes Petrified Wood (regardless of tree type [may become a grayscale tree]; and is irrevesible), plants get destroyed and animals/mobs die without any drops. Water on blight affected blocks would also induce Wither Effect (or Nausea), and any Skeleton that would try to spawn becomes a Wither Skeleton Archer or something. Removing the Wither Rose would only remove the blight, but for a longer time (maybe in a rate of block(s)/day). Only affects the Overworld.