The idea being, this set has flying and orbital, and orbital is like flying but more so -- orbital can block flying, flying can't block orbital, reach can block both.
I don't think that's very likely, but the reach change (a.) doesn't change how reach works in other sets, you only need reminder text on orbital and (b.) means "orbital" isn't completely "unblockable" outside this set.
See Challenge # 147.
The idea being, this set has flying and orbital, and orbital is like flying but more so -- orbital can block flying, flying can't block orbital, reach can block both.
I don't think that's very likely, but the reach change (a.) doesn't change how reach works in other sets, you only need reminder text on orbital and (b.) means "orbital" isn't completely "unblockable" outside this set.