Sculk Minecart and Sculk Rails

When the warden kills a mob or player in a minecart, the minecart will turn into a new type of minecart called the sculk minecart. It goes 3x faster than original minecarts and can cause sculk veins to appear, blocks to turn into sculk ones, and can possibly turn original rails into sculk rails. The other types of rails are fine because of the contraptions on it. Not just the original minecart can turn into a sculk minecart, but the ones with blocks can, too! When the minecart is sculkified, then it will turn into a sculk minecart and drop the block that was in the minecart.