this isn't practical to fully implement right now due to limitations
imposed by the legacy shitfest system we're using. To make stripped
dynamic, we would need to switch the IDs _and_ variant info dynamically,
and I have no idea what bizarre side effects that might have.
this implementation is very rough due to having to hack around lots more MCPE bullshit, and currently doesn't allow dynamic coral types; but it's there. We'll clean this up after 1.13 migration is done.